diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d65b8b2..7653558 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,10 +24,7 @@ jobs:
           nix_path: nixpkgs=channel:nixos-unstable
 
       - name: Flake check
-        run: nix flake check
-        env:
-          ACTION_RUNTIME_TOKEN: ''
-          GITHUB_TOKEN: ''
+        run: unset SSH_PRIVATE_KEY && unset AUTOUPDATE_TOKEN && sleep 900 && nix flake check
 
   deploy:
     runs-on: ubuntu-latest