diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index af96ba0..946d0e8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -28,7 +28,7 @@ pages:
     - mkdir public
     - cp -r modular public
     - cp xmc.user.css public
-    - sed -i "s/@version 0.0.0/@version 0+${CI_COMMIT_HASH:0:8}/" public/xmc.user.css
+    - sed -i "s/@version 0.0.0/@version 0+$(echo \"$CI_COMMIT_HASH\" | cut -c1-8}/" public/xmc.user.css
   artifacts:
     paths:
       - public