diff -u -r ../debianutils-4.4/add-shell ./add-shell
--- ../debianutils-4.4/add-shell	2013-07-28 03:30:26.000000000 +0200
+++ ./add-shell	2014-05-30 16:07:00.000000000 +0200
@@ -6,7 +6,7 @@
 	exit 1
 fi
 
-file=/etc/shells
+file=@TERMUX_PREFIX@/etc/shells
 # I want this to be GUARANTEED to be on the same filesystem as $file
 tmpfile=${file}.tmp