diff --git a/debian-bootstrap.sh b/debian-bootstrap.sh
index e5d67163..f570958d 100755
--- a/debian-bootstrap.sh
+++ b/debian-bootstrap.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -ex
+#!/usr/bin/env bash
 
 # Work in progress: create a list of commands necessary to get Stackage
 # up-and-running on a freshly installed Debian-based system (including Ubuntu).
@@ -10,6 +10,8 @@
 # instructions, see:
 #    http://www.stackage.org/install
 
+set -exu
+
 add-apt-repository -y ppa:zoogie/sdl2-snapshots
 add-apt-repository -y ppa:marutter/rrutter
 add-apt-repository -y ppa:openstack-ubuntu-testing/icehouse