--- ./src/callproc.c.orig	2020-07-29 23:40:42.000000000 +0200
+++ ./src/callproc.c	2020-09-14 21:36:04.897296897 +0200
@@ -1621,7 +1621,7 @@
     dir_warning ("arch-independent data dir", Vdata_directory);
 
   sh = getenv ("SHELL");
-  Vshell_file_name = build_string (sh ? sh : "/bin/sh");
+  Vshell_file_name = build_string (sh ? sh : "@TERMUX_PREFIX@/bin/sh");
 
   Lisp_Object gamedir = Qnil;
   if (PATH_GAME)