diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 809b13dc..1c55ffe4 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -18,4 +18,5 @@ jobs:
       - name: Check flake lockfile
         uses: DeterminateSystems/flake-checker-action@v4
       - name: Check flake outputs
-        run: nix flake check --impure
+        run: |
+          nix flake check --impure