diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 38cc6dac33d8bbeccdabe9443e017233f074756e..941c9340a199b08fda0aa02254916c9643b99749 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -13,7 +13,7 @@ pages:
   stage: deploy
   script:
     - yarn install
-    - yarn build:gitlab
+    - 'yarn build:gitlab --out-dir public/$(expr $CI_COMMIT_BRANCH : "instances/\(.*\)")'
   artifacts:
       paths:
         - public