diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 605d637..74bfb63 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -85,7 +85,7 @@ linter:
   <<: *builder
   stage: test
   script:
-    - nix --extra-experimental-features 'nix-command' fmt
+    - nix --extra-experimental-features 'nix-command flakes' fmt
 
 # dns always has to be deployed first
 deploy_dns: