diff -uNr gl4es/src/CMakeLists.txt gl4es.mod/src/CMakeLists.txt
--- gl4es/src/CMakeLists.txt	2021-06-21 07:53:58.734942738 +0000
+++ gl4es.mod/src/CMakeLists.txt	2021-06-21 08:02:39.158267430 +0000
@@ -211,10 +211,10 @@
     endif()
     install(TARGETS GL
     LIBRARY
-      DESTINATION "/usr/lib/gl4es/"
+      DESTINATION "@TERMUX_PREFIX@/lib/gl4es/"
     )
   install(FILES "../include/gl4esinit.h" "../include/gl4eshint.h"
-    DESTINATION "/usr/include/gl4es/"
+    DESTINATION "@TERMUX_PREFIX@/include/gl4es/"
     )
   endif()
 
diff -uNr gl4es/src/gl/framebuffers.c gl4es.mod/src/gl/framebuffers.c
--- gl4es/src/gl/framebuffers.c	2021-06-21 07:53:58.742943357 +0000
+++ gl4es.mod/src/gl/framebuffers.c	2021-06-21 07:55:02.829910677 +0000
@@ -1,6 +1,6 @@
 #include "framebuffers.h"
 
-#if !defined(ANDROID) && !defined(AMIGAOS4) && !defined(__EMSCRIPTEN__) && !defined(__APPLE__)
+#if !defined(__ANDROID__) && !defined(AMIGAOS4) && !defined(__EMSCRIPTEN__) && !defined(__APPLE__)
 #include <execinfo.h>
 #endif
 #include "../glx/hardext.h"
diff -uNr gl4es/src/gl/init.c gl4es.mod/src/gl/init.c
--- gl4es/src/gl/init.c	2021-06-21 07:53:58.743943435 +0000
+++ gl4es.mod/src/gl/init.c	2021-06-21 07:57:22.429734941 +0000
@@ -1,4 +1,4 @@
-#if !defined(ANDROID) && !defined(AMIGAOS4) && !defined(__EMSCRIPTEN__) && !defined(__APPLE__)
+#if !defined(__ANDROID__) && !defined(AMIGAOS4) && !defined(__EMSCRIPTEN__) && !defined(__APPLE__)
 #include <execinfo.h>
 #endif
 #include <stdio.h>