Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, DeterminateSystems/magic-nix-cache-action@v1, cachix/cachix-action@v12. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.