diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c042bf0db29f358fc348575ff5e05c3fee365dfa..c1480e885890dbb76403f406acf9b1d2e6bd69d8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,6 +7,7 @@ variables:
   DOCKER_IMAGE_BASE: registry.icinga.com/build-docker
   #ICINGA_BUILD_TYPE: snapshot
   ICINGA_BUILD_TYPE: release
+  ICINGA_BUILD_OS: rhel
 
 .build: &build
   stage: build