diff -uNr tt/src/system.c tt.mod/src/system.c
--- src/system.c	2021-08-30 19:02:18.000000000 +0100
+++ src/system.c	2021-11-12 09:28:43.000000000 +0100
@@ -75,7 +75,7 @@
 		case 0:
 			sprintf(temp, "exec %s", arg2);
 			argv[2] = temp;
-			execv("/bin/sh", argv);
+			execv("@TERMUX_PREFIX@/bin/sh", argv);
 			break;
 
 		default:
