diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cd5c483..3b9e135 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,7 +14,9 @@ jobs:
         uses: cachix/install-nix-action@v16
         with:
           extra_nix_config: |
+            auto-optimise-store = true
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+            experimental-features = nix-command flakes
       - name: Update flake.lock
         uses: DeterminateSystems/update-flake-lock@v16
         with: