github(nix-build): switch to better nix installer, attempt at fixing hash mismatch (#7701)

* github(nix-build): switch to DeterminateSystems/nix-installer-action

* github(nix-build): switch to a direct git reference instead of cloning

* github(nix-ci): attempt to fix CI for pull requests

.github/workflows/nix-build.yml

@@ -16,17 +16,12 @@ jobs:
 
     runs-on: ubuntu-latest
     steps:
-      - name: Clone repository
-        uses: actions/checkout@v4
-        with:
-          ref: ${{ github.ref }}
-          submodules: recursive
-
-      - uses: cachix/install-nix-action@v27
+      - uses: DeterminateSystems/nix-installer-action@main
       - uses: DeterminateSystems/magic-nix-cache-action@main
+
       - uses: cachix/cachix-action@v15
         with:
           name: hyprland
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
 
-      - run: nix build '.?submodules=1#${{ matrix.package }}' -L --extra-substituters "https://hyprland.cachix.org"
+      - run: nix build 'git+https://github.com/hyprwm/Hyprland?ref=${{ github.ref }}&submodules=1#${{ matrix.package }}' -L --extra-substituters "https://hyprland.cachix.org"

.github/workflows/nix-ci.yml

@@ -9,7 +9,6 @@ jobs:
     secrets: inherit
 
   build:
-    if: (github.event_name != 'pull_request' || github.event.pull_request.head.repo.fork) && !contains(needs.*.result, 'failure')
-    needs: update-inputs
+    if: (github.event_name != 'pull_request' || github.event.pull_request.head.repo.fork)
     uses: ./.github/workflows/nix-build.yml
     secrets: inherit