Index: tcltk/netgen.sh.in
--- tcltk/netgen.sh.in.orig
+++ tcltk/netgen.sh.in
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # For installation, put this file (netgen.sh) in a standard executable path.
 # Put startup script "netgen.tcl" and shared library "tclnetgen.so"