Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -38,4 +38,9 @@ clean-job:       # This job runs in the build stage, which runs first.
     script:
       - rm -rf /home/gitlab-runner/builds/*
     rules:
-      - if: '$CI_COMMIT_MESSAGE =~ /build/'
+      - if: '$CI_COMMIT_MESSAGE =~ /build/'
+cleanup_on_failure_job:
+  stage: clean  # Should be in a later stage than the job that might fail
+  when: on_failure # <-- This is the key keyword
+  script:
+      - rm -rf /home/gitlab-runner/builds/*