try nix cache action

.gitea/workflows/build.yaml

@@ -9,7 +9,26 @@ jobs:
     steps:
       - uses: actions/checkout@v3
         name: Checkout
-      - uses: https://github.com/DeterminateSystems/magic-nix-cache-action@main
+      - uses: nixbuild/nix-quick-install-action@v27
+
+      - name: Restore and cache Nix store
+        uses: https://github.com/nix-community/cache-nix-action@v5
+        with:
+          # restore and save a cache using this key
+          primary-key: nix-${{ runner.os }}-${{ hashFiles('**/*.nix') }}
+          # if there's no cache hit, restore a cache by this prefix
+          restore-prefixes-first-match: nix-${{ runner.os }}-
+          # collect garbage until Nix store size (in bytes) is at most this number
+          # before trying to save a new cache
+          gc-max-store-size-linux: 1073741824
+          # do purge caches
+          purge: true
+          # purge all versions of the cache
+          purge-prefixes: cache-${{ runner.os }}-
+          # created more than this number of seconds ago relative to the start of the `Post Restore` phase
+          purge-created: 0
+          # except the version with the `primary-key`, if it exists
+          purge-primary-key: never
       - name: Metadata
         run: |
           nix flake metadata