--- tcl/ngcgui.tcl.orig	2016-06-25 02:19:12 UTC
+++ tcl/ngcgui.tcl
@@ -1,4 +1,4 @@
-#!/usr/bin/wish
+#!/usr/bin/env wish8.6
 
 #-----------------------------------------------------------------------
 # ngcgui.tcl is a front-end gui that reads one or more single function