make flake check workflow better

.github/workflows/flake-check.yml

@@ -6,8 +6,19 @@ jobs:
   flake-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
-      - uses: cachix/install-nix-action@v30
         with:
-          github_access_token: ${{ secrets.github_token }}
+          logger: pretty
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - uses: cachix/cachix-action@v15
+        with:
+          name: cything
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+      - name: Setup Attic cache
+        uses: ryanccn/attic-action@v0
+        with:
+          endpoint: ${{ vars.ATTIC_ENDPOINT }}
+          cache: ${{ vars.ATTIC_CACHE }}
+          token: ${{ secrets.ATTIC_TOKEN }}
+      - uses: actions/checkout@v4
       - run: nix flake check