diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index dc356e8..5094a7c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -10,7 +10,7 @@ include:
   # done some of the time
   - local: .gitlab/build.yml
     rules:
-      - if: $CI_MERGE_REQUEST_TARGET_BRANCH_NAME == "main"
+      - if: $CI_PIPELINE_SOURCE == "merge_request_event"
       - if: $CI_PIPELINE_SOURCE == "tag"
       - if: $CI_COMMIT_BRANCH == "main"