diff -u -r ../../tt/src/system.c ./system.c
--- ../../tt/src/system.c	2017-07-16 14:27:12.000000000 +0000
+++ ./system.c	2018-08-06 20:36:28.313378209 +0000
@@ -67,7 +67,7 @@
 		case 0:
 			sprintf(temp, "exec %s", right);
 			argv[2] = temp;
-			execv("/bin/sh", argv);
+			execv("@TERMUX_PREFIX@/bin/sh", argv);
 			break;
 
 		default: