feat(ci): switch installers + enable magic cache

.github/workflows/build.yml

@@ -9,7 +9,7 @@ on:
     # rebuild everyday at 2:51
     # TIP: Choose a random time here so not all repositories are build at once:
     # https://www.random.org/clock-times/?num=1&earliest=01%3A00&latest=08%3A00&interval=5&format=html&rnd=new
-    - cron:  '51 2 * * *'
+    - cron:  '35 6 * * *'
 jobs:
   tests:
     strategy:
@@ -22,42 +22,30 @@ jobs:
         # https://github.com/nix-community/NUR/blob/master/repos.json
         nurRepo:
           - <YOUR_REPO_NAME>
-        # Set this to cache your build results in cachix for faster builds
-        # in CI and for everyone who uses your cache.
-        #
-        # Format: Your cachix cache host name without the ".cachix.org" suffix.
-        # Example: mycache (for mycache.cachix.org)
-        #
-        # For this to work, you also need to set the CACHIX_SIGNING_KEY or
-        # CACHIX_AUTH_TOKEN secret in your repository secrets settings in
-        # Github found at
-        # https://github.com/<your_githubname>/nur-packages/settings/secrets
-        cachixName:
-          - <YOUR_CACHIX_NAME>
         nixPath:
           - nixpkgs=https://github.com/NixOS/nixpkgs/archive/refs/heads/nixpkgs-unstable.tar.gz
           - nixpkgs=https://github.com/NixOS/nixpkgs/archive/refs/heads/nixos-unstable.tar.gz
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
-    - name: Install nix
-      uses: cachix/install-nix-action@V27
+    - uses: DeterminateSystems/nix-installer-action@main
       with:
-        nix_path: "${{ matrix.nixPath }}"
-        extra_nix_config: |
+        extra-conf: |
           experimental-features = nix-command flakes
           access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+          nix-path = "${{ matrix.nixPath }}"
+    - uses: DeterminateSystems/magic-nix-cache-action@main
     - name: Show nixpkgs version
       run: nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'
-    - name: Setup cachix
-      uses: cachix/cachix-action@v15
+    # - name: Setup cachix
+    #   uses: cachix/cachix-action@v15
       # Don't replace <YOUR_CACHIX_NAME> here!
-      if: ${{ matrix.cachixName != '<YOUR_CACHIX_NAME>' }}
-      with:
-        name: ${{ matrix.cachixName }}
-        signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+      # if: ${{ matrix.cachixName != '<YOUR_CACHIX_NAME>' }}
+      # with:
+      #   name: ${{ matrix.cachixName }}
+      #   signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+      #   authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
     - name: Check evaluation
       run: |
         nix-env -f . -qa \* --meta --xml \