diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5ec70d3c4..93738248a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,7 @@
 default:
   image: fpco/stack-build:lts-13.21
-  before_script: |
-    apt-get install -y --no-install-recommends g++
+  before_script:
+    - apt-get install -y --no-install-recommends g++
 
 variables:
   STACK_ROOT: "${CI_PROJECT_DIR}/.stack"