diff --git a/.github/workflows/nix-build.yml b/.github/workflows/nix-build.yml
index fae1736c3..43edd6afd 100644
--- a/.github/workflows/nix-build.yml
+++ b/.github/workflows/nix-build.yml
@@ -14,6 +14,6 @@ jobs:
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - uses: DeterminateSystems/magic-nix-cache-action@v13
-    - run: nix build -L
+    - run: nix build -L -j auto
     - run: nix develop --command echo OK
-    - run: nix flake check -vL
+    - run: nix flake check -vL -j auto