diff --git a/debian/helper-script/ncat-w32 b/debian/helper-script/ncat-w32
index a4f28a9..a43994a 100755
--- a/debian/helper-script/ncat-w32
+++ b/debian/helper-script/ncat-w32
@@ -1,3 +1,5 @@
-#!/bin/sh
+#!/usr/bin/env sh
+
+set -e
 
 kali-treecd "/usr/share/windows-resources/ncat/" "ncat-w32" 1 false