diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f30ae4fe31dfae67240751244ba921bcbf3692a0..8168937b7035c74cc2cf42e20e887d72c1c2b99f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -19,6 +19,10 @@ variables:
 .build:
   extends: .php
   stage: build
+  only:
+    refs:
+      - master
+      - schedules
   variables:
     CACHE_DIR: "$CI_PROJECT_DIR/.cache"
     MAKE_SHIM_CACHE: "$CACHE_DIR/make-shim"