diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 6f9d20f..5f65a23 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -13,7 +13,7 @@ jobs:
       - uses: DeterminateSystems/nix-installer-action@v9
       - uses: DeterminateSystems/magic-nix-cache-action@v2
       - name: Check formatting
-        run: nix run .#formatter.x86_64-linux -- --check
+        run: nix run .#formatter.x86_64-linux -- --check .
       - name: Run `nix flake check`
         run: nix flake check
   lockfile: