use nix installer in both workflows

.github/workflows/build.yml

@@ -20,21 +20,15 @@ jobs:
       - run: sudo rm -rf /opt&
 
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v25 # v25
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
       - uses: DeterminateSystems/magic-nix-cache-action@v2
+
       - uses: cachix/cachix-action@v14
         with:
           name: daylin
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
-      # - name: Build all flake outputs
-      #   run: |
-      #     cachix watch-exec daylin -- \
-      #     nix build github:srid/devour-flake \
-      #     -L --no-link --print-out-paths \
-      #     --override-input flake .
+
       - name: Build
         run: |
           nix run . --accept-flake-config -- cache --host "${{ matrix.host }}" --flake .