diff --git a/contrib/hgk b/contrib/hgk
--- a/contrib/hgk
+++ b/contrib/hgk
@@ -1,4 +1,4 @@
-#!/usr/bin/wish
+#!/usr/bin/env wish
 
 # Copyright (C) 2005 Paul Mackerras.  All rights reserved.
 # This program is free software; it may be used, copied, modified