diff --git a/.gitlab-ci-unix.yml b/.gitlab-ci-unix.yml
index a31f39826cbfa7da890ec44519bd91f12286828f..64c1429103d0d3e92bf103ddb88839765c12d5aa 100644
--- a/.gitlab-ci-unix.yml
+++ b/.gitlab-ci-unix.yml
@@ -24,7 +24,7 @@ spec:
 
 ".$[[ inputs.os ]]-build":
   stage: build
-  extends: .$[[ inputs.os ]]
+  extends: ".$[[ inputs.os ]]"
 
 ".$[[ inputs.os ]]-test":
   stage: test