diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index cfccd19..1d46978 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,6 +2,7 @@ build:
   stage: build
   image: alpine:3.13
   script:
+    - apk add bash abuild
     - ./build.sh
   rules:
     - if: '$CI_COMMIT_BRANCH == "master"'
diff --git a/build.sh b/build.sh
index 52e77db..10f1d8e 100755
--- a/build.sh
+++ b/build.sh
@@ -1,4 +1,6 @@
-#!/bin/sh
+#!/bin/bash
+
+set -euxo pipefail
 
 for pkg in packages/*; do
 	cd $pkg