diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d9daeca..1a6e070 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,8 +23,7 @@ build-job:       # This job runs in the build stage, which runs first.
   tags:
     - linux
   before_script:
-    - apt update
-    - apt install -y cmake libgtk2.0-dev
+    - apk --no-cache add cmake libgtk2.0-dev
   script:
     - echo "Configuring"
     - cmake -B build .