Only release build when all steps succeed

PKGBUILD

@@ -1,7 +1,7 @@
 # Maintainer: Daniel <daniel.de.clooet@yoursurprise.com>
 pkgname=zfs-snapshotter
 pkgver=0.0.2
-pkgrel=1
+pkgrel=2
 pkgdesc='Systemd snapshotter tool'
 
 source=("zfs-daily-snapshot@.timer" "zfs-daily-snapshot@.service" "zfs-snapshot.rb")
@@ -13,6 +13,8 @@ sha256sums=('SKIP'
             'SKIP')
 
 package() {
+  set -e
+
   install -Dm755 "${srcdir}/zfs-snapshot.rb" "${pkgdir}/usr/bin/zfs-snapshot.rb"
 
   install -Dm644 "${srcdir}/zfs-daily-snapshot@.timer" "${pkgdir}/etc/systemd/system/zfs-daily-snapshot@.timer"