diff -uNr radare2-3.2.1/libr/util/sandbox.c radare2-3.2.1.mod/libr/util/sandbox.c
--- radare2-3.2.1/libr/util/sandbox.c	2019-01-08 18:14:43.000000000 +0200
+++ radare2-3.2.1.mod/libr/util/sandbox.c	2019-03-02 02:42:52.796061199 +0200
@@ -154,7 +154,7 @@
 		return system (x);
 #endif
 	}
-	return execl ("/bin/sh", "sh", "-c", x, (const char*)NULL);
+	return execl ("@TERMUX_PREFIX@/bin/sh", "sh", "-c", x, (const char*)NULL);
 #else
 	#include <spawn.h>
 	if (n && !strchr (x, '|')) {