diff --git a/gitlab-ci-template.yml b/gitlab-ci-template.yml
index b0594cbd24f7d640f443c8e75b5a09b60275ead6..03705819e670e59e439971019dddfb433871f6a8 100644
--- a/gitlab-ci-template.yml
+++ b/gitlab-ci-template.yml
@@ -23,7 +23,7 @@ container-build:
     - export VCS_REF=$CI_COMMIT_SHA
     - export VCS_URL=$CI_PROJECT_URL
   script:
-    - si-fix "$(CI_REGISTRY_BUILD_DOCKERFILE:-./Dockerfile)"
+    - si-fix "${CI_REGISTRY_BUILD_DOCKERFILE:-./Dockerfile}"
     - podman build --pull $CI_REGISTRY_BUILD_ARGS -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA" .
     - podman push "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA"