From: Kevin Day <thekevinday@gmail.com>
Date: Wed, 28 Apr 2021 04:48:28 +0000 (-0500)
Subject: Cleanup: Relocate headers into appropriate sub-directories.
X-Git-Tag: 0.5.3~5
X-Git-Url: https://git.kevux.org/?a=commitdiff_plain;h=b7c3ebc1ba03964fbde75818317aa9d1dbfc5672;p=fll

Cleanup: Relocate headers into appropriate sub-directories.

Have the FLL project contain its headers within a sub-directory of 'fll'.
This promotes better organization.

The level_3 programs are just that, programs, and as such will not be under 'fll' but instead will be under their own sub-directory.

The programs are moved out of level_3 and into the program include directory, with their sub-directory using the program name.
---

diff --git a/build/level_0/settings b/build/level_0/settings
index b5e93a6..cfa62c1 100644
--- a/build/level_0/settings
+++ b/build/level_0/settings
@@ -32,7 +32,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/build/level_1/settings b/build/level_1/settings
index d19202a..8a059ac 100644
--- a/build/level_1/settings
+++ b/build/level_1/settings
@@ -32,7 +32,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/build/level_2/settings b/build/level_2/settings
index b8c42db..745889d 100644
--- a/build/level_2/settings
+++ b/build/level_2/settings
@@ -32,7 +32,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_2
+path_headers fll/level_2
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/build/monolithic/settings b/build/monolithic/settings
index 7c64f00..08134fe 100644
--- a/build/monolithic/settings
+++ b/build/monolithic/settings
@@ -32,7 +32,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers
+path_headers fll
 path_headers_preserve yes
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_account/c/account.h b/level_0/f_account/c/account.h
index 76bb496..69a5591 100644
--- a/level_0/f_account/c/account.h
+++ b/level_0/f_account/c/account.h
@@ -20,13 +20,13 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
 
 // fll-0 account includes
-#include <level_0/account-common.h>
+#include <fll/level_0/account-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_account/data/build/settings b/level_0/f_account/data/build/settings
index abf00a3..e3b76da 100644
--- a/level_0/f_account/data/build/settings
+++ b/level_0/f_account/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_capability/c/capability.h b/level_0/f_capability/c/capability.h
index 2c4ed75..178deb3 100644
--- a/level_0/f_capability/c/capability.h
+++ b/level_0/f_capability/c/capability.h
@@ -35,14 +35,14 @@
 #endif // _di_libcap_
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/type_array.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/type_array.h>
+#include <fll/level_0/string.h>
 
 // fll-0 capability includes
-#include <level_0/capability-common.h>
+#include <fll/level_0/capability-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_capability/data/build/settings b/level_0/f_capability/data/build/settings
index 6a6fb17..782a27b 100644
--- a/level_0/f_capability/data/build/settings
+++ b/level_0/f_capability/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_color/c/color.h b/level_0/f_color/c/color.h
index a1bd178..d0edb9c 100644
--- a/level_0/f_color/c/color.h
+++ b/level_0/f_color/c/color.h
@@ -18,13 +18,13 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
 
 // fll-0 color includes
-#include <level_0/color-common.h>
+#include <fll/level_0/color-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_color/data/build/settings b/level_0/f_color/data/build/settings
index 0b794f3..ef880f8 100644
--- a/level_0/f_color/data/build/settings
+++ b/level_0/f_color/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_console/c/console.h b/level_0/f_console/c/console.h
index 824d38f..6e9ff8e 100644
--- a/level_0/f_console/c/console.h
+++ b/level_0/f_console/c/console.h
@@ -14,15 +14,15 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/type_array.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/type_array.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
 
 // fll-0 console includes
-#include <level_0/console-common.h>
+#include <fll/level_0/console-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_console/data/build/settings b/level_0/f_console/data/build/settings
index b1827bf..1b61fd0 100644
--- a/level_0/f_console/data/build/settings
+++ b/level_0/f_console/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_control_group/c/control_group.h b/level_0/f_control_group/c/control_group.h
index ed3c491..0272303 100644
--- a/level_0/f_control_group/c/control_group.h
+++ b/level_0/f_control_group/c/control_group.h
@@ -19,13 +19,13 @@
 // libc includes
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
 
 // fll-1 control includes
-#include <level_0/control_group-common.h>
+#include <fll/level_0/control_group-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_control_group/data/build/settings b/level_0/f_control_group/data/build/settings
index 1d5dd0c..9b44872 100644
--- a/level_0/f_control_group/data/build/settings
+++ b/level_0/f_control_group/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_conversion/c/conversion.h b/level_0/f_conversion/c/conversion.h
index d39098f..b6b3b31 100644
--- a/level_0/f_conversion/c/conversion.h
+++ b/level_0/f_conversion/c/conversion.h
@@ -15,14 +15,14 @@
 #include <stdlib.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
 
 // fll-0 conversion includes
-#include <level_0/conversion-common.h>
+#include <fll/level_0/conversion-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_conversion/data/build/settings b/level_0/f_conversion/data/build/settings
index 3c9df3a..5ec7434 100644
--- a/level_0/f_conversion/data/build/settings
+++ b/level_0/f_conversion/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_directory/c/directory.h b/level_0/f_directory/c/directory.h
index 8a83666..e7c6124 100644
--- a/level_0/f_directory/c/directory.h
+++ b/level_0/f_directory/c/directory.h
@@ -30,14 +30,14 @@
 #endif // __USE_XOPEN_EXTENDED
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/directory_type.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/directory_type.h>
 
 // fll-0 directory includes
-#include <level_0/directory-common.h>
+#include <fll/level_0/directory-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_directory/c/directory_type.h b/level_0/f_directory/c/directory_type.h
index 6958fa9..6beb909 100644
--- a/level_0/f_directory/c/directory_type.h
+++ b/level_0/f_directory/c/directory_type.h
@@ -11,10 +11,10 @@
 #define _F_directory_type_h
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_directory/data/build/settings b/level_0/f_directory/data/build/settings
index 9f53c5f..c790df0 100644
--- a/level_0/f_directory/data/build/settings
+++ b/level_0/f_directory/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_environment/c/environment.h b/level_0/f_environment/c/environment.h
index 0f7744a..32015ca 100644
--- a/level_0/f_environment/c/environment.h
+++ b/level_0/f_environment/c/environment.h
@@ -15,13 +15,13 @@
 #include <sys/stat.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
 
 // fll-0 environment includes
-#include <level_0/environment-common.h>
+#include <fll/level_0/environment-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_environment/data/build/settings b/level_0/f_environment/data/build/settings
index 4c2b482..2f41471 100644
--- a/level_0/f_environment/data/build/settings
+++ b/level_0/f_environment/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_execute/c/execute.h b/level_0/f_execute/c/execute.h
index 942c48a..7b87119 100644
--- a/level_0/f_execute/c/execute.h
+++ b/level_0/f_execute/c/execute.h
@@ -17,11 +17,11 @@
 #include <sched.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
 
 // fll-0 execute includes
-#include <level_0/execute-common.h>
+#include <fll/level_0/execute-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_execute/data/build/settings b/level_0/f_execute/data/build/settings
index 23cbbe1..a2e6549 100644
--- a/level_0/f_execute/data/build/settings
+++ b/level_0/f_execute/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_file/c/file.h b/level_0/f_file/c/file.h
index f346270..46fcc77 100644
--- a/level_0/f_file/c/file.h
+++ b/level_0/f_file/c/file.h
@@ -32,13 +32,13 @@
 #include <sys/sysmacros.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
 
 // fll-0 file includes
-#include <level_0/file-common.h>
+#include <fll/level_0/file-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_file/data/build/settings b/level_0/f_file/data/build/settings
index b82e705..f45950d 100644
--- a/level_0/f_file/data/build/settings
+++ b/level_0/f_file/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_fss/c/fss.h b/level_0/f_fss/c/fss.h
index e94fdd4..8d41691 100644
--- a/level_0/f_fss/c/fss.h
+++ b/level_0/f_fss/c/fss.h
@@ -16,21 +16,21 @@
 #define _F_fss_h
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/type_array.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/type_array.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
 
 // fll-0 fss includes
-#include <level_0/fss-common.h>
-#include <level_0/fss_comment.h>
-#include <level_0/fss_delimit.h>
-#include <level_0/fss_quote.h>
-#include <level_0/fss_named.h>
-#include <level_0/fss_nest.h>
-#include <level_0/fss_set.h>
+#include <fll/level_0/fss-common.h>
+#include <fll/level_0/fss_comment.h>
+#include <fll/level_0/fss_delimit.h>
+#include <fll/level_0/fss_quote.h>
+#include <fll/level_0/fss_named.h>
+#include <fll/level_0/fss_nest.h>
+#include <fll/level_0/fss_set.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_fss/data/build/settings b/level_0/f_fss/data/build/settings
index 93dce31..7f0ac81 100644
--- a/level_0/f_fss/data/build/settings
+++ b/level_0/f_fss/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_iki/c/iki.h b/level_0/f_iki/c/iki.h
index 8ffb35e..825ab1d 100644
--- a/level_0/f_iki/c/iki.h
+++ b/level_0/f_iki/c/iki.h
@@ -18,15 +18,15 @@
 #include <sys/stat.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/type_array.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/type_array.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
 
 // fll-0 iki includes
-#include <level_0/iki-common.h>
+#include <fll/level_0/iki-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_iki/data/build/settings b/level_0/f_iki/data/build/settings
index 882f7c0..1c2b0df 100644
--- a/level_0/f_iki/data/build/settings
+++ b/level_0/f_iki/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_limit/c/limit.h b/level_0/f_limit/c/limit.h
index 13c4f5f..ce55f02 100644
--- a/level_0/f_limit/c/limit.h
+++ b/level_0/f_limit/c/limit.h
@@ -18,12 +18,12 @@
 #include <sys/resource.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
 
 // fll-0 control includes
-#include <level_0/limit-common.h>
+#include <fll/level_0/limit-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_limit/data/build/settings b/level_0/f_limit/data/build/settings
index 19d24d3..aa884d3 100644
--- a/level_0/f_limit/data/build/settings
+++ b/level_0/f_limit/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_memory/c/memory.h b/level_0/f_memory/c/memory.h
index 87751da..6e3ba4a 100644
--- a/level_0/f_memory/c/memory.h
+++ b/level_0/f_memory/c/memory.h
@@ -20,12 +20,12 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
 
 // fll-0 memory includes
-#include <level_0/memory-common.h>
-#include <level_0/memory_structure.h>
+#include <fll/level_0/memory-common.h>
+#include <fll/level_0/memory_structure.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_memory/data/build/settings b/level_0/f_memory/data/build/settings
index c029d46..91a8506 100644
--- a/level_0/f_memory/data/build/settings
+++ b/level_0/f_memory/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_path/c/path.h b/level_0/f_path/c/path.h
index 3f17c56..f2d9317 100644
--- a/level_0/f_path/c/path.h
+++ b/level_0/f_path/c/path.h
@@ -17,13 +17,13 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
 
 // fll-0 path includes
-#include <level_0/path-common.h>
+#include <fll/level_0/path-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_path/data/build/settings b/level_0/f_path/data/build/settings
index 7dc51aa..f26db2e 100644
--- a/level_0/f_path/data/build/settings
+++ b/level_0/f_path/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_pipe/c/pipe.h b/level_0/f_pipe/c/pipe.h
index d28e98a..9aef03c 100644
--- a/level_0/f_pipe/c/pipe.h
+++ b/level_0/f_pipe/c/pipe.h
@@ -17,8 +17,8 @@
 #include <sys/stat.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_pipe/data/build/settings b/level_0/f_pipe/data/build/settings
index 768aee5..558cf72 100644
--- a/level_0/f_pipe/data/build/settings
+++ b/level_0/f_pipe/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_print/c/print.h b/level_0/f_print/c/print.h
index fb79af8..b57a69c 100644
--- a/level_0/f_print/c/print.h
+++ b/level_0/f_print/c/print.h
@@ -20,10 +20,10 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_print/data/build/settings b/level_0/f_print/data/build/settings
index fc8fb43..ae4befc 100644
--- a/level_0/f_print/data/build/settings
+++ b/level_0/f_print/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_serialize/c/serialize.h b/level_0/f_serialize/c/serialize.h
index ec1502e..44c8ac5 100644
--- a/level_0/f_serialize/c/serialize.h
+++ b/level_0/f_serialize/c/serialize.h
@@ -16,14 +16,14 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
 
 // fll-0 serialize includes
-#include <level_0/serialize-common.h>
+#include <fll/level_0/serialize-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_serialize/data/build/settings b/level_0/f_serialize/data/build/settings
index 25e7947..d7a38c9 100644
--- a/level_0/f_serialize/data/build/settings
+++ b/level_0/f_serialize/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_signal/c/signal.h b/level_0/f_signal/c/signal.h
index d3370ec..98003cf 100644
--- a/level_0/f_signal/c/signal.h
+++ b/level_0/f_signal/c/signal.h
@@ -18,11 +18,11 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
 
 // fll-0 signal includes
-#include <level_0/signal-common.h>
+#include <fll/level_0/signal-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_signal/data/build/settings b/level_0/f_signal/data/build/settings
index 90457d7..180ff10 100644
--- a/level_0/f_signal/data/build/settings
+++ b/level_0/f_signal/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_socket/c/socket.h b/level_0/f_socket/c/socket.h
index ca44c6c..a1008ac 100644
--- a/level_0/f_socket/c/socket.h
+++ b/level_0/f_socket/c/socket.h
@@ -20,13 +20,13 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
 
 // fll-0 socket includes
-#include <level_0/socket-common.h>
+#include <fll/level_0/socket-common.h>
 
 #ifdef __cplusplus
 extern "C"{
diff --git a/level_0/f_socket/data/build/settings b/level_0/f_socket/data/build/settings
index c89a599..ac39ad9 100644
--- a/level_0/f_socket/data/build/settings
+++ b/level_0/f_socket/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_status/c/status_array.h b/level_0/f_status/c/status_array.h
index e2e99b7..1eb1b64 100644
--- a/level_0/f_status/c/status_array.h
+++ b/level_0/f_status/c/status_array.h
@@ -13,7 +13,7 @@
 #define _F_status_array_h
 
 // fll-0 includes
-#include <level_0/memory.h>
+#include <fll/level_0/memory.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_status/data/build/settings b/level_0/f_status/data/build/settings
index 039c5a9..397019f 100644
--- a/level_0/f_status/data/build/settings
+++ b/level_0/f_status/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_string/c/string.h b/level_0/f_string/c/string.h
index ea289b9..3c8e616 100644
--- a/level_0/f_string/c/string.h
+++ b/level_0/f_string/c/string.h
@@ -17,17 +17,17 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/type.h>
 
 // fll-0 string includes
-#include <level_0/string-common.h>
-#include <level_0/string_dynamic.h>
-#include <level_0/string_map.h>
-#include <level_0/string_quantity.h>
-#include <level_0/string_range.h>
-#include <level_0/string_triple.h>
+#include <fll/level_0/string-common.h>
+#include <fll/level_0/string_dynamic.h>
+#include <fll/level_0/string_map.h>
+#include <fll/level_0/string_quantity.h>
+#include <fll/level_0/string_range.h>
+#include <fll/level_0/string_triple.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_string/c/string_dynamic.h b/level_0/f_string/c/string_dynamic.h
index 2f17f1a..fd6f42c 100644
--- a/level_0/f_string/c/string_dynamic.h
+++ b/level_0/f_string/c/string_dynamic.h
@@ -17,7 +17,7 @@ extern "C" {
 #endif
 
 // fll-0 string includes
-#include <level_0/string_range.h>
+#include <fll/level_0/string_range.h>
 
 /**
  * A string that is analogous to f_string_dynamic_t but intended for static-only uses.
diff --git a/level_0/f_string/data/build/settings b/level_0/f_string/data/build/settings
index c3146b2..3fdf929 100644
--- a/level_0/f_string/data/build/settings
+++ b/level_0/f_string/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_thread/c/thread.h b/level_0/f_thread/c/thread.h
index 0468882..303cb68 100644
--- a/level_0/f_thread/c/thread.h
+++ b/level_0/f_thread/c/thread.h
@@ -23,13 +23,13 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
 
 // fll-0 thread includes
-#include <level_0/thread-common.h>
+#include <fll/level_0/thread-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_thread/data/build/settings b/level_0/f_thread/data/build/settings
index 351bfb4..55062ff 100644
--- a/level_0/f_thread/data/build/settings
+++ b/level_0/f_thread/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_type/data/build/settings b/level_0/f_type/data/build/settings
index 5f1232c..c423679 100644
--- a/level_0/f_type/data/build/settings
+++ b/level_0/f_type/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_type_array/c/type_array.h b/level_0/f_type_array/c/type_array.h
index b179582..cd3b104 100644
--- a/level_0/f_type_array/c/type_array.h
+++ b/level_0/f_type_array/c/type_array.h
@@ -14,11 +14,11 @@
 #define _F_type_array_h
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/memory.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/memory.h>
 
 // fll-0 type_array includes
-#include <level_0/type_array-common.h>
+#include <fll/level_0/type_array-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_type_array/data/build/settings b/level_0/f_type_array/data/build/settings
index ed87396..f14e1a8 100644
--- a/level_0/f_type_array/data/build/settings
+++ b/level_0/f_type_array/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_0/f_utf/c/utf.h b/level_0/f_utf/c/utf.h
index 8586f53..408f599 100644
--- a/level_0/f_utf/c/utf.h
+++ b/level_0/f_utf/c/utf.h
@@ -41,18 +41,18 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
 
 // fll-0 utf includes
-#include <level_0/utf-common.h>
-#include <level_0/utf_dynamic.h>
-#include <level_0/utf_map.h>
-#include <level_0/utf_quantity.h>
-#include <level_0/utf_range.h>
-#include <level_0/utf_triple.h>
+#include <fll/level_0/utf-common.h>
+#include <fll/level_0/utf_dynamic.h>
+#include <fll/level_0/utf_map.h>
+#include <fll/level_0/utf_quantity.h>
+#include <fll/level_0/utf_range.h>
+#include <fll/level_0/utf_triple.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_0/f_utf/c/utf_dynamic.h b/level_0/f_utf/c/utf_dynamic.h
index c418140..bc44d3c 100644
--- a/level_0/f_utf/c/utf_dynamic.h
+++ b/level_0/f_utf/c/utf_dynamic.h
@@ -17,7 +17,7 @@ extern "C" {
 #endif
 
 // fll-0 string includes
-#include <level_0/utf_range.h>
+#include <fll/level_0/utf_range.h>
 
 /**
  * A string that is analogous to f_utf_string_dynamic_t but intended for static-only uses.
diff --git a/level_0/f_utf/data/build/settings b/level_0/f_utf/data/build/settings
index f84d852..08bcc48 100644
--- a/level_0/f_utf/data/build/settings
+++ b/level_0/f_utf/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_0
+path_headers fll/level_0
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_console/c/console.h b/level_1/fl_console/c/console.h
index 51662e2..f9d3ae8 100644
--- a/level_1/fl_console/c/console.h
+++ b/level_1/fl_console/c/console.h
@@ -16,14 +16,14 @@
 #include <sys/stat.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/console.h>
-#include <level_0/conversion.h>
-#include <level_0/path.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/conversion.h>
+#include <fll/level_0/path.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_console/data/build/settings b/level_1/fl_console/data/build/settings
index 0ae0039..b711e4f 100644
--- a/level_1/fl_console/data/build/settings
+++ b/level_1/fl_console/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_control_group/c/control_group.h b/level_1/fl_control_group/c/control_group.h
index c02ce20..5c5bcc1 100644
--- a/level_1/fl_control_group/c/control_group.h
+++ b/level_1/fl_control_group/c/control_group.h
@@ -25,12 +25,12 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/control_group.h>
-#include <level_0/file.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/control_group.h>
+#include <fll/level_0/file.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_control_group/data/build/settings b/level_1/fl_control_group/data/build/settings
index beb8a29..d4648fe 100644
--- a/level_1/fl_control_group/data/build/settings
+++ b/level_1/fl_control_group/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_conversion/c/conversion.h b/level_1/fl_conversion/c/conversion.h
index 884b9d3..0027652 100644
--- a/level_1/fl_conversion/c/conversion.h
+++ b/level_1/fl_conversion/c/conversion.h
@@ -15,12 +15,12 @@
 #include <stdlib.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/conversion.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/conversion.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_conversion/data/build/settings b/level_1/fl_conversion/data/build/settings
index 872bdbd..6633b3d 100644
--- a/level_1/fl_conversion/data/build/settings
+++ b/level_1/fl_conversion/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_directory/c/directory.h b/level_1/fl_directory/c/directory.h
index ee91fa5..2f50b81 100644
--- a/level_1/fl_directory/c/directory.h
+++ b/level_1/fl_directory/c/directory.h
@@ -30,15 +30,15 @@
 #endif // __USE_XOPEN_EXTENDED
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/status_array.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/directory.h>
-#include <level_0/file.h>
-#include <level_0/path.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/status_array.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/path.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_directory/data/build/settings b/level_1/fl_directory/data/build/settings
index d927299..3143201 100644
--- a/level_1/fl_directory/data/build/settings
+++ b/level_1/fl_directory/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_environment/c/environment.h b/level_1/fl_environment/c/environment.h
index 43da3d8..cb4b3bb 100644
--- a/level_1/fl_environment/c/environment.h
+++ b/level_1/fl_environment/c/environment.h
@@ -14,12 +14,12 @@
 #include <sys/stat.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/environment.h>
-#include <level_0/path.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/environment.h>
+#include <fll/level_0/path.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_environment/data/build/settings b/level_1/fl_environment/data/build/settings
index 9949204..fab3997 100644
--- a/level_1/fl_environment/data/build/settings
+++ b/level_1/fl_environment/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_execute/c/execute.h b/level_1/fl_execute/c/execute.h
index e3a804c..746a4bf 100644
--- a/level_1/fl_execute/c/execute.h
+++ b/level_1/fl_execute/c/execute.h
@@ -22,16 +22,16 @@
 #include <sched.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/type_array.h>
-#include <level_0/execute.h>
-#include <level_0/limit.h>
-#include <level_0/signal.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/type_array.h>
+#include <fll/level_0/execute.h>
+#include <fll/level_0/limit.h>
+#include <fll/level_0/signal.h>
 
 // fll-1 execute includes
-#include <level_1/execute-common.h>
+#include <fll/level_1/execute-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_execute/data/build/settings b/level_1/fl_execute/data/build/settings
index e41ea57..52d5344 100644
--- a/level_1/fl_execute/data/build/settings
+++ b/level_1/fl_execute/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_fss/c/fss.h b/level_1/fl_fss/c/fss.h
index 25c7952..8e7a462 100644
--- a/level_1/fl_fss/c/fss.h
+++ b/level_1/fl_fss/c/fss.h
@@ -13,16 +13,16 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/file.h>
-#include <level_0/fss.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/fss.h>
 
 // fll-1 includes
-#include <level_1/fss_status.h>
+#include <fll/level_1/fss_status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_fss/c/fss_basic.h b/level_1/fl_fss/c/fss_basic.h
index 4f42dda..3e3e935 100644
--- a/level_1/fl_fss/c/fss_basic.h
+++ b/level_1/fl_fss/c/fss_basic.h
@@ -15,16 +15,16 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
-#include <level_0/memory.h>
-#include <level_0/utf.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/utf.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_status.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_fss/c/fss_basic_list.h b/level_1/fl_fss/c/fss_basic_list.h
index f30b31b..fc48db1 100644
--- a/level_1/fl_fss/c/fss_basic_list.h
+++ b/level_1/fl_fss/c/fss_basic_list.h
@@ -15,17 +15,17 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
-#include <level_0/utf.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/utf.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_basic.h>
-#include <level_1/fss_status.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_basic.h>
+#include <fll/level_1/fss_status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_fss/c/fss_embedded_list.h b/level_1/fl_fss/c/fss_embedded_list.h
index 06272c1..8328e28 100644
--- a/level_1/fl_fss/c/fss_embedded_list.h
+++ b/level_1/fl_fss/c/fss_embedded_list.h
@@ -15,17 +15,17 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
-#include <level_0/utf.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/utf.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_basic.h>
-#include <level_1/fss_status.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_basic.h>
+#include <fll/level_1/fss_status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_fss/c/fss_extended.h b/level_1/fl_fss/c/fss_extended.h
index b0271f6..fea847a 100644
--- a/level_1/fl_fss/c/fss_extended.h
+++ b/level_1/fl_fss/c/fss_extended.h
@@ -15,16 +15,16 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
-#include <level_0/utf.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/utf.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_status.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_fss/c/fss_extended_list.h b/level_1/fl_fss/c/fss_extended_list.h
index b084e37..b866fac 100644
--- a/level_1/fl_fss/c/fss_extended_list.h
+++ b/level_1/fl_fss/c/fss_extended_list.h
@@ -15,17 +15,17 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
-#include <level_0/utf.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/utf.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_basic.h>
-#include <level_1/fss_status.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_basic.h>
+#include <fll/level_1/fss_status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_fss/c/fss_status.h b/level_1/fl_fss/c/fss_status.h
index 2dde3ee..dc0053a 100644
--- a/level_1/fl_fss/c/fss_status.h
+++ b/level_1/fl_fss/c/fss_status.h
@@ -14,7 +14,7 @@
 #define _FL_fss_status_h
 
 // fll-0 includes
-#include <level_0/status.h>
+#include <fll/level_0/status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_fss/data/build/settings b/level_1/fl_fss/data/build/settings
index a751775..ddd8e3d 100644
--- a/level_1/fl_fss/data/build/settings
+++ b/level_1/fl_fss/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_iki/c/iki.h b/level_1/fl_iki/c/iki.h
index 0588ae7..04735c3 100644
--- a/level_1/fl_iki/c/iki.h
+++ b/level_1/fl_iki/c/iki.h
@@ -18,12 +18,12 @@
 #include <sys/stat.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/iki.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/iki.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_iki/data/build/settings b/level_1/fl_iki/data/build/settings
index d0c6e28..0055266 100644
--- a/level_1/fl_iki/data/build/settings
+++ b/level_1/fl_iki/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_print/c/print.h b/level_1/fl_print/c/print.h
index 30bd721..6b97c35 100644
--- a/level_1/fl_print/c/print.h
+++ b/level_1/fl_print/c/print.h
@@ -13,12 +13,12 @@
 #define _FL_print_h
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/conversion.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/conversion.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_print/data/build/settings b/level_1/fl_print/data/build/settings
index 7e7155d..c6ae59e 100644
--- a/level_1/fl_print/data/build/settings
+++ b/level_1/fl_print/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_status/c/status.h b/level_1/fl_status/c/status.h
index 468f88c..64fb73f 100644
--- a/level_1/fl_status/c/status.h
+++ b/level_1/fl_status/c/status.h
@@ -11,11 +11,11 @@
 #define _FL_status_h
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_status/data/build/settings b/level_1/fl_status/data/build/settings
index 0412304..0076846 100644
--- a/level_1/fl_status/data/build/settings
+++ b/level_1/fl_status/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_string/c/string.h b/level_1/fl_string/c/string.h
index fba9ae4..c8484d3 100644
--- a/level_1/fl_string/c/string.h
+++ b/level_1/fl_string/c/string.h
@@ -24,11 +24,11 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_string/data/build/settings b/level_1/fl_string/data/build/settings
index 021f4a1..0d86181 100644
--- a/level_1/fl_string/data/build/settings
+++ b/level_1/fl_string/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_utf/c/utf.h b/level_1/fl_utf/c/utf.h
index e9a67d2..1adc550 100644
--- a/level_1/fl_utf/c/utf.h
+++ b/level_1/fl_utf/c/utf.h
@@ -24,11 +24,11 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_utf/data/build/settings b/level_1/fl_utf/data/build/settings
index 301efa6..d5d4314 100644
--- a/level_1/fl_utf/data/build/settings
+++ b/level_1/fl_utf/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_1/fl_utf_file/c/utf_file.h b/level_1/fl_utf_file/c/utf_file.h
index a915f81..d710b10 100644
--- a/level_1/fl_utf_file/c/utf_file.h
+++ b/level_1/fl_utf_file/c/utf_file.h
@@ -14,12 +14,12 @@
 #include <string.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/file.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/file.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_1/fl_utf_file/data/build/settings b/level_1/fl_utf_file/data/build/settings
index a5fd073..40c2d05 100644
--- a/level_1/fl_utf_file/data/build/settings
+++ b/level_1/fl_utf_file/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_1
+path_headers fll/level_1
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_2/fll_control_group/c/control_group.h b/level_2/fll_control_group/c/control_group.h
index 5561c4e..001990d 100644
--- a/level_2/fll_control_group/c/control_group.h
+++ b/level_2/fll_control_group/c/control_group.h
@@ -13,19 +13,19 @@
 // libc includes
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/control_group.h>
-#include <level_0/directory.h>
-#include <level_0/file.h>
-#include <level_0/path.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/control_group.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/path.h>
 
 // fll-1 includes
-#include <level_1/control_group.h>
-#include <level_1/directory.h>
+#include <fll/level_1/control_group.h>
+#include <fll/level_1/directory.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_control_group/data/build/settings b/level_2/fll_control_group/data/build/settings
index 640ab4a..bcf5390 100644
--- a/level_2/fll_control_group/data/build/settings
+++ b/level_2/fll_control_group/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_2
+path_headers fll/level_2
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_2/fll_error/c/error.h b/level_2/fll_error/c/error.h
index 35156c3..b87047d 100644
--- a/level_2/fll_error/c/error.h
+++ b/level_2/fll_error/c/error.h
@@ -14,20 +14,20 @@
 #include <stdio.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/console.h>
-#include <level_0/color.h>
-#include <level_0/file.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/file.h>
 
 // fll-1 includes
-#include <level_1/string.h>
+#include <fll/level_1/string.h>
 
 // fll-2 error includes
-#include <level_2/error-common.h>
+#include <fll/level_2/error-common.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_error/data/build/settings b/level_2/fll_error/data/build/settings
index 27eff0b..e90ce46 100644
--- a/level_2/fll_error/data/build/settings
+++ b/level_2/fll_error/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_2
+path_headers fll/level_2
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_2/fll_execute/c/execute.h b/level_2/fll_execute/c/execute.h
index 3e18b53..979019b 100644
--- a/level_2/fll_execute/c/execute.h
+++ b/level_2/fll_execute/c/execute.h
@@ -27,29 +27,29 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/capability.h>
-#include <level_0/control_group.h>
-#include <level_0/environment.h>
-#include <level_0/execute.h>
-#include <level_0/file.h>
-#include <level_0/limit.h>
-#include <level_0/path.h>
-#include <level_0/signal.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/capability.h>
+#include <fll/level_0/control_group.h>
+#include <fll/level_0/environment.h>
+#include <fll/level_0/execute.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/limit.h>
+#include <fll/level_0/path.h>
+#include <fll/level_0/signal.h>
 
 #ifndef _di_pthread_support_
-  #include <level_0/thread.h>
+  #include <fll/level_0/thread.h>
 #endif // _di_pthread_support_
 
 // fll-1 includes
-#include <level_1/control_group.h>
-#include <level_1/environment.h>
-#include <level_1/execute.h>
-#include <level_1/string.h>
+#include <fll/level_1/control_group.h>
+#include <fll/level_1/environment.h>
+#include <fll/level_1/execute.h>
+#include <fll/level_1/string.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_execute/data/build/settings b/level_2/fll_execute/data/build/settings
index e915a46..3b5ced3 100644
--- a/level_2/fll_execute/data/build/settings
+++ b/level_2/fll_execute/data/build/settings
@@ -30,7 +30,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_2
+path_headers fll/level_2
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_2/fll_file/c/file.h b/level_2/fll_file/c/file.h
index 4f3bcc6..491cc26 100644
--- a/level_2/fll_file/c/file.h
+++ b/level_2/fll_file/c/file.h
@@ -14,17 +14,17 @@
 #include <stdio.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/color.h>
-#include <level_0/directory.h>
-#include <level_0/file.h>
-#include <level_0/signal.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/signal.h>
 
 // fll-1 includes
-#include <level_1/directory.h>
+#include <fll/level_1/directory.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_file/data/build/settings b/level_2/fll_file/data/build/settings
index 23d651e..e88cc62 100644
--- a/level_2/fll_file/data/build/settings
+++ b/level_2/fll_file/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_2
+path_headers fll/level_2
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_2/fll_fss/c/fss.h b/level_2/fll_fss/c/fss.h
index 91084a8..f0b303c 100644
--- a/level_2/fll_fss/c/fss.h
+++ b/level_2/fll_fss/c/fss.h
@@ -13,18 +13,18 @@
 #define _FLL_fss_h
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/fss.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/fss.h>
 
 // fll-1 includes
-#include <level_1/conversion.h>
-#include <level_1/fss.h>
-#include <level_1/fss_status.h>
-#include <level_1/string.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_status.h>
+#include <fll/level_1/string.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_fss/c/fss_basic.h b/level_2/fll_fss/c/fss_basic.h
index a7b7aeb..9b083fb 100644
--- a/level_2/fll_fss/c/fss_basic.h
+++ b/level_2/fll_fss/c/fss_basic.h
@@ -11,18 +11,18 @@
 #define _FLL_fss_basic_h
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
-#include <level_0/utf.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/utf.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_status.h>
-#include <level_1/fss_basic.h>
-#include <level_1/string.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_status.h>
+#include <fll/level_1/fss_basic.h>
+#include <fll/level_1/string.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_fss/c/fss_basic_list.h b/level_2/fll_fss/c/fss_basic_list.h
index b4fc04b..d45cb6c 100644
--- a/level_2/fll_fss/c/fss_basic_list.h
+++ b/level_2/fll_fss/c/fss_basic_list.h
@@ -11,17 +11,17 @@
 #define _FLL_fss_basic_list_h
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_basic_list.h>
-#include <level_1/fss_status.h>
-#include <level_1/string.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_basic_list.h>
+#include <fll/level_1/fss_status.h>
+#include <fll/level_1/string.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_fss/c/fss_embedded_list.h b/level_2/fll_fss/c/fss_embedded_list.h
index 7b5b6aa..cbd18ab 100644
--- a/level_2/fll_fss/c/fss_embedded_list.h
+++ b/level_2/fll_fss/c/fss_embedded_list.h
@@ -11,16 +11,16 @@
 #define _FLL_fss_embedded_list_h
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_embedded_list.h>
-#include <level_1/fss_status.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_embedded_list.h>
+#include <fll/level_1/fss_status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_fss/c/fss_extended.h b/level_2/fll_fss/c/fss_extended.h
index b558275..541bc05 100644
--- a/level_2/fll_fss/c/fss_extended.h
+++ b/level_2/fll_fss/c/fss_extended.h
@@ -11,16 +11,16 @@
 #define _FLL_fss_extended_h
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_status.h>
-#include <level_1/fss_extended.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_status.h>
+#include <fll/level_1/fss_extended.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_fss/c/fss_extended_list.h b/level_2/fll_fss/c/fss_extended_list.h
index f13a05f..4b0f407 100644
--- a/level_2/fll_fss/c/fss_extended_list.h
+++ b/level_2/fll_fss/c/fss_extended_list.h
@@ -11,16 +11,16 @@
 #define _FLL_fss_extended_list_h
 
 // fll-0 includes
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_extended_list.h>
-#include <level_1/fss_status.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_extended_list.h>
+#include <fll/level_1/fss_status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_fss/c/fss_status.h b/level_2/fll_fss/c/fss_status.h
index ab1d975..99ae9ff 100644
--- a/level_2/fll_fss/c/fss_status.h
+++ b/level_2/fll_fss/c/fss_status.h
@@ -11,19 +11,19 @@
 #define _FLL_fss_status_h
 
 // fll-0 includes
-#include <level_0/conversion.h>
-#include <level_0/status.h>
-#include <level_0/fss.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/type.h>
+#include <fll/level_0/conversion.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/type.h>
 
 // fll-1 includes
-#include <level_1/fss.h>
-#include <level_1/fss_basic.h>
-#include <level_1/fss_status.h>
-#include <level_1/status.h>
-#include <level_1/string.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/fss_basic.h>
+#include <fll/level_1/fss_status.h>
+#include <fll/level_1/status.h>
+#include <fll/level_1/string.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_fss/data/build/settings b/level_2/fll_fss/data/build/settings
index 1cdcbae..d3caba3 100644
--- a/level_2/fll_fss/data/build/settings
+++ b/level_2/fll_fss/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_2
+path_headers fll/level_2
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_2/fll_iki/c/iki.h b/level_2/fll_iki/c/iki.h
index 7be8305..ae4ea10 100644
--- a/level_2/fll_iki/c/iki.h
+++ b/level_2/fll_iki/c/iki.h
@@ -19,16 +19,16 @@
 #include <sys/stat.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/iki.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/iki.h>
 
 // fll-1 includes
-#include <level_1/iki.h>
-#include <level_1/string.h>
+#include <fll/level_1/iki.h>
+#include <fll/level_1/string.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_iki/data/build/settings b/level_2/fll_iki/data/build/settings
index 3b64722..8af3baf 100644
--- a/level_2/fll_iki/data/build/settings
+++ b/level_2/fll_iki/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_2
+path_headers fll/level_2
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_2/fll_path/c/path.h b/level_2/fll_path/c/path.h
index 776bd0a..b6839c3 100644
--- a/level_2/fll_path/c/path.h
+++ b/level_2/fll_path/c/path.h
@@ -14,14 +14,14 @@
 #include <stdio.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/path.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/path.h>
 
 // fll-1 includes
-#include <level_1/string.h>
+#include <fll/level_1/string.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_path/data/build/settings b/level_2/fll_path/data/build/settings
index cfd9bba..0142b7f 100644
--- a/level_2/fll_path/data/build/settings
+++ b/level_2/fll_path/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_2
+path_headers fll/level_2
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_2/fll_program/c/program.h b/level_2/fll_program/c/program.h
index dcd04d6..14b0a27 100644
--- a/level_2/fll_program/c/program.h
+++ b/level_2/fll_program/c/program.h
@@ -14,17 +14,17 @@
 #include <stdio.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/file.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/file.h>
 
 // fll-1 includes
-#include <level_1/string.h>
+#include <fll/level_1/string.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_program/data/build/settings b/level_2/fll_program/data/build/settings
index 9fe3774..235cc49 100644
--- a/level_2/fll_program/data/build/settings
+++ b/level_2/fll_program/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_2
+path_headers fll/level_2
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_2/fll_status/c/status.h b/level_2/fll_status/c/status.h
index 25f6a01..386afd3 100644
--- a/level_2/fll_status/c/status.h
+++ b/level_2/fll_status/c/status.h
@@ -11,16 +11,16 @@
 #define _FLL_status_h
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/conversion.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/conversion.h>
 
 // fll-1 includes
-#include <level_1/string.h>
-#include <level_1/status.h>
+#include <fll/level_1/string.h>
+#include <fll/level_1/status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_2/fll_status/data/build/settings b/level_2/fll_status/data/build/settings
index ced564e..53fc9bd 100644
--- a/level_2/fll_status/data/build/settings
+++ b/level_2/fll_status/data/build/settings
@@ -29,7 +29,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_2
+path_headers fll/level_2
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/byte_dump/c/byte_dump.h b/level_3/byte_dump/c/byte_dump.h
index 603c10c..569e9cc 100644
--- a/level_3/byte_dump/c/byte_dump.h
+++ b/level_3/byte_dump/c/byte_dump.h
@@ -21,27 +21,27 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/conversion.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/conversion.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/string.h>
-#include <level_1/utf.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/string.h>
+#include <fll/level_1/utf.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/byte_dump/data/build/settings b/level_3/byte_dump/data/build/settings
index 60d6dfc..d553615 100644
--- a/level_3/byte_dump/data/build/settings
+++ b/level_3/byte_dump/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/byte_dump
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/control/c/control.h b/level_3/control/c/control.h
index 9085b1f..a2d979c 100644
--- a/level_3/control/c/control.h
+++ b/level_3/control/c/control.h
@@ -16,25 +16,25 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/directory.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/control/data/build/settings b/level_3/control/data/build/settings
index 9a5995e..54b9970 100644
--- a/level_3/control/data/build/settings
+++ b/level_3/control/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/control
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/controller/c/controller.h b/level_3/controller/c/controller.h
index 46426c3..9384d40 100644
--- a/level_3/controller/c/controller.h
+++ b/level_3/controller/c/controller.h
@@ -39,44 +39,44 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/type_array.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/account.h>
-#include <level_0/capability.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/control_group.h>
-#include <level_0/directory.h>
-#include <level_0/environment.h>
-#include <level_0/execute.h>
-#include <level_0/file.h>
-#include <level_0/fss.h>
-#include <level_0/path.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
-#include <level_0/signal.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/type_array.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/account.h>
+#include <fll/level_0/capability.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/control_group.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/environment.h>
+#include <fll/level_0/execute.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/fss.h>
+#include <fll/level_0/path.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
+#include <fll/level_0/signal.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/control_group.h>
-#include <level_1/environment.h>
-#include <level_1/fss.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/control_group.h>
+#include <fll/level_1/environment.h>
+#include <fll/level_1/fss.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/control_group.h>
-#include <level_2/error.h>
-#include <level_2/execute.h>
-#include <level_2/fss.h>
-#include <level_2/fss_basic_list.h>
-#include <level_2/fss_extended.h>
-#include <level_2/fss_extended_list.h>
-#include <level_2/path.h>
-#include <level_2/program.h>
+#include <fll/level_2/control_group.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/execute.h>
+#include <fll/level_2/fss.h>
+#include <fll/level_2/fss_basic_list.h>
+#include <fll/level_2/fss_extended.h>
+#include <fll/level_2/fss_extended_list.h>
+#include <fll/level_2/path.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/controller/data/build/settings b/level_3/controller/data/build/settings
index 97d7cab..599a0e5 100644
--- a/level_3/controller/data/build/settings
+++ b/level_3/controller/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/controller
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fake/c/fake.h b/level_3/fake/c/fake.h
index 0d5c342..75fa954 100644
--- a/level_3/fake/c/fake.h
+++ b/level_3/fake/c/fake.h
@@ -50,41 +50,41 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/type_array.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/account.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/directory.h>
-#include <level_0/environment.h>
-#include <level_0/execute.h>
-#include <level_0/file.h>
-#include <level_0/iki.h>
-#include <level_0/path.h>
-#include <level_0/print.h>
-#include <level_0/signal.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/type_array.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/account.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/environment.h>
+#include <fll/level_0/execute.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/iki.h>
+#include <fll/level_0/path.h>
+#include <fll/level_0/print.h>
+#include <fll/level_0/signal.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/directory.h>
-#include <level_1/environment.h>
-#include <level_1/iki.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/directory.h>
+#include <fll/level_1/environment.h>
+#include <fll/level_1/iki.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/execute.h>
-#include <level_2/file.h>
-#include <level_2/fss.h>
-#include <level_2/fss_basic_list.h>
-#include <level_2/fss_extended.h>
-#include <level_2/path.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/execute.h>
+#include <fll/level_2/file.h>
+#include <fll/level_2/fss.h>
+#include <fll/level_2/fss_basic_list.h>
+#include <fll/level_2/fss_extended.h>
+#include <fll/level_2/path.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fake/data/build/settings b/level_3/fake/data/build/settings
index d9cf266..c8537fd 100644
--- a/level_3/fake/data/build/settings
+++ b/level_3/fake/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fake
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/firewall/c/firewall.h b/level_3/firewall/c/firewall.h
index 1655e80..ad76af5 100644
--- a/level_3/firewall/c/firewall.h
+++ b/level_3/firewall/c/firewall.h
@@ -18,31 +18,31 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/type_array.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/directory.h>
-#include <level_0/execute.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/type_array.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/execute.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/execute.h>
-#include <level_2/fss_basic.h>
-#include <level_2/fss_basic_list.h>
-#include <level_2/fss_extended.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/execute.h>
+#include <fll/level_2/fss_basic.h>
+#include <fll/level_2/fss_basic_list.h>
+#include <fll/level_2/fss_extended.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/firewall/data/build/settings b/level_3/firewall/data/build/settings
index 9474a59..b299b9b 100644
--- a/level_3/firewall/data/build/settings
+++ b/level_3/firewall/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/firewall
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_basic_list_read/c/fss_basic_list_read.h b/level_3/fss_basic_list_read/c/fss_basic_list_read.h
index 792cd5c..66e21b7 100644
--- a/level_3/fss_basic_list_read/c/fss_basic_list_read.h
+++ b/level_3/fss_basic_list_read/c/fss_basic_list_read.h
@@ -21,29 +21,29 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/directory.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/print.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/print.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/file.h>
-#include <level_2/fss_basic_list.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/file.h>
+#include <fll/level_2/fss_basic_list.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_basic_list_read/data/build/settings b/level_3/fss_basic_list_read/data/build/settings
index feb45dc..7cfc6d1 100644
--- a/level_3/fss_basic_list_read/data/build/settings
+++ b/level_3/fss_basic_list_read/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_basic_list_read
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_basic_list_write/c/fss_basic_list_write.h b/level_3/fss_basic_list_write/c/fss_basic_list_write.h
index 81cf574..4cd11d5 100644
--- a/level_3/fss_basic_list_write/c/fss_basic_list_write.h
+++ b/level_3/fss_basic_list_write/c/fss_basic_list_write.h
@@ -16,27 +16,27 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/fss_basic_list.h>
-#include <level_1/status.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/fss_basic_list.h>
+#include <fll/level_1/status.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/fss_status.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/fss_status.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_basic_list_write/data/build/settings b/level_3/fss_basic_list_write/data/build/settings
index b980591..2921c81 100644
--- a/level_3/fss_basic_list_write/data/build/settings
+++ b/level_3/fss_basic_list_write/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_basic_list_write
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_basic_read/c/fss_basic_read.h b/level_3/fss_basic_read/c/fss_basic_read.h
index dfde6f3..bf84697 100644
--- a/level_3/fss_basic_read/c/fss_basic_read.h
+++ b/level_3/fss_basic_read/c/fss_basic_read.h
@@ -21,29 +21,29 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/directory.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/print.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/print.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/file.h>
-#include <level_2/fss_basic.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/file.h>
+#include <fll/level_2/fss_basic.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_basic_read/data/build/settings b/level_3/fss_basic_read/data/build/settings
index c2471d6..00563b8 100644
--- a/level_3/fss_basic_read/data/build/settings
+++ b/level_3/fss_basic_read/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_basic_read
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_basic_write/c/fss_basic_write.h b/level_3/fss_basic_write/c/fss_basic_write.h
index 10d61b1..0317b7a 100644
--- a/level_3/fss_basic_write/c/fss_basic_write.h
+++ b/level_3/fss_basic_write/c/fss_basic_write.h
@@ -16,28 +16,28 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/fss_basic.h>
-#include <level_1/status.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/fss_basic.h>
+#include <fll/level_1/status.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/fss_basic.h>
-#include <level_2/fss_status.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/fss_basic.h>
+#include <fll/level_2/fss_status.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_basic_write/data/build/settings b/level_3/fss_basic_write/data/build/settings
index 390c1d4..8d7f36d 100644
--- a/level_3/fss_basic_write/data/build/settings
+++ b/level_3/fss_basic_write/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_basic_write
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_embedded_list_read/c/fss_embedded_list_read.h b/level_3/fss_embedded_list_read/c/fss_embedded_list_read.h
index e218b66..83015b8 100644
--- a/level_3/fss_embedded_list_read/c/fss_embedded_list_read.h
+++ b/level_3/fss_embedded_list_read/c/fss_embedded_list_read.h
@@ -21,29 +21,29 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/directory.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/print.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/print.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/file.h>
-#include <level_2/fss_embedded_list.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/file.h>
+#include <fll/level_2/fss_embedded_list.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_embedded_list_read/data/build/settings b/level_3/fss_embedded_list_read/data/build/settings
index 66fc59a..e275a4d 100644
--- a/level_3/fss_embedded_list_read/data/build/settings
+++ b/level_3/fss_embedded_list_read/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_embedded_list_read
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_embedded_list_write/c/fss_embedded_list_write.h b/level_3/fss_embedded_list_write/c/fss_embedded_list_write.h
index d7f0086..f509726 100644
--- a/level_3/fss_embedded_list_write/c/fss_embedded_list_write.h
+++ b/level_3/fss_embedded_list_write/c/fss_embedded_list_write.h
@@ -16,28 +16,28 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/fss_embedded_list.h>
-#include <level_1/status.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/fss_embedded_list.h>
+#include <fll/level_1/status.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/fss_status.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/fss_status.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_embedded_list_write/data/build/settings b/level_3/fss_embedded_list_write/data/build/settings
index 3875d8c..ea2d1df 100644
--- a/level_3/fss_embedded_list_write/data/build/settings
+++ b/level_3/fss_embedded_list_write/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_embedded_list_write
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_extended_list_read/c/fss_extended_list_read.h b/level_3/fss_extended_list_read/c/fss_extended_list_read.h
index 71adcda..b301c0e 100644
--- a/level_3/fss_extended_list_read/c/fss_extended_list_read.h
+++ b/level_3/fss_extended_list_read/c/fss_extended_list_read.h
@@ -21,29 +21,29 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/directory.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/print.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/print.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/file.h>
-#include <level_2/fss_extended_list.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/file.h>
+#include <fll/level_2/fss_extended_list.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_extended_list_read/data/build/settings b/level_3/fss_extended_list_read/data/build/settings
index acbbb56..a91df46 100644
--- a/level_3/fss_extended_list_read/data/build/settings
+++ b/level_3/fss_extended_list_read/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_extended_list_read
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_extended_list_write/c/fss_extended_list_write.h b/level_3/fss_extended_list_write/c/fss_extended_list_write.h
index b41c6aa..8d929f5 100644
--- a/level_3/fss_extended_list_write/c/fss_extended_list_write.h
+++ b/level_3/fss_extended_list_write/c/fss_extended_list_write.h
@@ -16,28 +16,28 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/fss_extended_list.h>
-#include <level_1/status.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/fss_extended_list.h>
+#include <fll/level_1/status.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/fss_status.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/fss_status.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_extended_list_write/data/build/settings b/level_3/fss_extended_list_write/data/build/settings
index 06ead4e..a821d4d 100644
--- a/level_3/fss_extended_list_write/data/build/settings
+++ b/level_3/fss_extended_list_write/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_extended_list_write
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_extended_read/c/fss_extended_read.h b/level_3/fss_extended_read/c/fss_extended_read.h
index 978c537..54bbf53 100644
--- a/level_3/fss_extended_read/c/fss_extended_read.h
+++ b/level_3/fss_extended_read/c/fss_extended_read.h
@@ -21,29 +21,29 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/directory.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/directory.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/print.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/print.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/file.h>
-#include <level_2/fss_extended.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/file.h>
+#include <fll/level_2/fss_extended.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_extended_read/data/build/settings b/level_3/fss_extended_read/data/build/settings
index 5014bd1..fb97dc5 100644
--- a/level_3/fss_extended_read/data/build/settings
+++ b/level_3/fss_extended_read/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_extended_read
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_extended_write/c/fss_extended_write.h b/level_3/fss_extended_write/c/fss_extended_write.h
index c2d1c64..bd2d817 100644
--- a/level_3/fss_extended_write/c/fss_extended_write.h
+++ b/level_3/fss_extended_write/c/fss_extended_write.h
@@ -16,27 +16,27 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/file.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/status.h>
-#include <level_1/fss_extended.h>
-#include <level_1/string.h>
+#include <fll/level_1/status.h>
+#include <fll/level_1/fss_extended.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/fss_extended.h>
-#include <level_2/fss_status.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/fss_extended.h>
+#include <fll/level_2/fss_status.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_extended_write/data/build/settings b/level_3/fss_extended_write/data/build/settings
index bf94b5e..ea7e03a 100644
--- a/level_3/fss_extended_write/data/build/settings
+++ b/level_3/fss_extended_write/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_extended_write
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/fss_status_code/c/fss_status_code.h b/level_3/fss_status_code/c/fss_status_code.h
index ce50d8e..e7cd6c0 100644
--- a/level_3/fss_status_code/c/fss_status_code.h
+++ b/level_3/fss_status_code/c/fss_status_code.h
@@ -16,28 +16,28 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/conversion.h>
-#include <level_0/console.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/conversion.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/status.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/status.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/fss_status.h>
-#include <level_2/program.h>
-#include <level_2/status.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/fss_status.h>
+#include <fll/level_2/program.h>
+#include <fll/level_2/status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/fss_status_code/data/build/settings b/level_3/fss_status_code/data/build/settings
index 8004319..993c5b3 100644
--- a/level_3/fss_status_code/data/build/settings
+++ b/level_3/fss_status_code/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/fss_status_code
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/iki_read/c/iki_read.h b/level_3/iki_read/c/iki_read.h
index 56388f6..4c5e703 100644
--- a/level_3/iki_read/c/iki_read.h
+++ b/level_3/iki_read/c/iki_read.h
@@ -22,30 +22,30 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/conversion.h>
-#include <level_0/file.h>
-#include <level_0/iki.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/conversion.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/iki.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/iki.h>
-#include <level_1/print.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/iki.h>
+#include <fll/level_1/print.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/file.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/file.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/iki_read/data/build/settings b/level_3/iki_read/data/build/settings
index 0faa1a4..e44df30 100644
--- a/level_3/iki_read/data/build/settings
+++ b/level_3/iki_read/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/iki_read
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/iki_write/c/iki_write.h b/level_3/iki_write/c/iki_write.h
index 2ee21f6..9f949a3 100644
--- a/level_3/iki_write/c/iki_write.h
+++ b/level_3/iki_write/c/iki_write.h
@@ -22,31 +22,31 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/console.h>
-#include <level_0/conversion.h>
-#include <level_0/file.h>
-#include <level_0/iki.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/conversion.h>
+#include <fll/level_0/file.h>
+#include <fll/level_0/iki.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/iki.h>
-#include <level_1/print.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/iki.h>
+#include <fll/level_1/print.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/file.h>
-#include <level_2/iki.h>
-#include <level_2/program.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/file.h>
+#include <fll/level_2/iki.h>
+#include <fll/level_2/program.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/iki_write/data/build/settings b/level_3/iki_write/data/build/settings
index eefc89b..ba2325f 100644
--- a/level_3/iki_write/data/build/settings
+++ b/level_3/iki_write/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/iki_write
 path_headers_preserve no
 path_library_script script
 path_library_shared shared
diff --git a/level_3/status_code/c/status_code.h b/level_3/status_code/c/status_code.h
index 22df705..890b4a2 100644
--- a/level_3/status_code/c/status_code.h
+++ b/level_3/status_code/c/status_code.h
@@ -16,27 +16,27 @@
 #include <unistd.h>
 
 // fll-0 includes
-#include <level_0/type.h>
-#include <level_0/status.h>
-#include <level_0/memory.h>
-#include <level_0/string.h>
-#include <level_0/utf.h>
-#include <level_0/color.h>
-#include <level_0/conversion.h>
-#include <level_0/console.h>
-#include <level_0/pipe.h>
-#include <level_0/print.h>
+#include <fll/level_0/type.h>
+#include <fll/level_0/status.h>
+#include <fll/level_0/memory.h>
+#include <fll/level_0/string.h>
+#include <fll/level_0/utf.h>
+#include <fll/level_0/color.h>
+#include <fll/level_0/conversion.h>
+#include <fll/level_0/console.h>
+#include <fll/level_0/pipe.h>
+#include <fll/level_0/print.h>
 
 // fll-1 includes
-#include <level_1/console.h>
-#include <level_1/conversion.h>
-#include <level_1/status.h>
-#include <level_1/string.h>
+#include <fll/level_1/console.h>
+#include <fll/level_1/conversion.h>
+#include <fll/level_1/status.h>
+#include <fll/level_1/string.h>
 
 // fll-2 includes
-#include <level_2/error.h>
-#include <level_2/program.h>
-#include <level_2/status.h>
+#include <fll/level_2/error.h>
+#include <fll/level_2/program.h>
+#include <fll/level_2/status.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/level_3/status_code/data/build/settings b/level_3/status_code/data/build/settings
index 2cb4277..6161f4b 100644
--- a/level_3/status_code/data/build/settings
+++ b/level_3/status_code/data/build/settings
@@ -31,7 +31,7 @@ build_script yes
 build_shared yes
 build_static no
 
-path_headers level_3
+path_headers program/status_code
 path_headers_preserve no
 path_library_script script
 path_library_shared shared