Tweak chroot helper

helper/make_chroot.sh

@@ -1,9 +1,12 @@
 #!/bin/sh
+set -e
 
-sudo debootstrap \
+ln -sf /usr/share/debootstrap/scripts/testing /usr/share/debootstrap/scripts/green
+
+debootstrap \
 	--keyring=/usr/share/keyrings/pureos-archive-keyring.gpg \
 	green \
 	lbchroot \
 	http://repo.puri.sm/pureos
 
-sudo chroot lbchroot 'ln /usr/share/debootstrap/scripts/testing /usr/share/debootstrap/scripts/green'
+chroot lbchroot 'ln -s /usr/share/debootstrap/scripts/testing /usr/share/debootstrap/scripts/green'