diff --git a/.woodpecker/.build-perls.yml b/.woodpecker/.build-perls.yml
index 2ce74d1..57cc9e9 100644
--- a/.woodpecker/.build-perls.yml
+++ b/.woodpecker/.build-perls.yml
@@ -11,7 +11,7 @@ steps:
       - tar -xvJf output-${CI_PIPELINE_NUMBER}.tar.xz
       - cpanm --installdeps .
       - docker login -u simcop2387 -p $GITEA_DOCKER_TOKEN gitea.simcop2387.info
-      - perl build.pl --suffix $CI_PIPELINE_CREATED --build_args OS_TAG=$CI_PIPELINE_CREATED
+      - perl build.pl --suffix $CI_PIPELINE_CREATED --build_args OS_TAG=-$CI_PIPELINE_CREATED
     secrets: [gitea_docker_token]
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock