diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 29141f96..0fb3df9d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,7 +9,7 @@ jobs:
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - name: Check flake outputs
-        run: NIXPKGS_ALLOW_INSECURE=1 nix --impure flake check
+        run: NIXPKGS_ALLOW_INSECURE=1 nix flake check --impure
 
   build-custom-packages:
     runs-on: ubuntu-latest