--- ./usr/include/sys/cdefs.h.orig	2020-01-18 00:06:05.760188085 +0000
+++ ./usr/include/sys/cdefs.h	2020-01-18 00:09:52.363968728 +0000
@@ -358,3 +358,6 @@
 #if __has_include(<android/ndk-version.h>)
 #include <android/ndk-version.h>
 #endif
+#define __TERMUX__ 1
+#define __TERMUX_PREFIX__ "@TERMUX_PREFIX@"
+
