CI: use org-wide actions

.github/workflows/nix.yml

@@ -1,6 +1,7 @@
 name: Build & Test
 
 on: [push, pull_request, workflow_dispatch]
+
 jobs:
   nix:
     strategy:
@@ -9,46 +10,8 @@ jobs:
           - hyprutils
           - hyprutils-with-tests
 
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-
-    - name: Install Nix
-      uses: nixbuild/nix-quick-install-action@v31
-      with:
-        nix_conf: |
-          keep-env-derivations = true
-          keep-outputs = true
-
-    - name: Restore and save Nix store
-      uses: nix-community/cache-nix-action@v6
-      with:
-        # restore and save a cache using this key
-        primary-key: nix-${{ runner.os }}-${{ hashFiles('**/*.nix', '**/flake.lock') }}
-        # if there's no cache hit, restore a cache by this prefix
-        restore-prefixes-first-match: nix-${{ runner.os }}-
-        # collect garbage until the Nix store size (in bytes) is at most this number
-        # before trying to save a new cache
-        # 1G = 1073741824
-        gc-max-store-size-linux: 1G
-        # do purge caches
-        purge: true
-        # purge all versions of the cache
-        purge-prefixes: nix-${{ runner.os }}-
-        # created more than this number of seconds ago
-        purge-created: 0
-        # or, last accessed more than this number of seconds ago
-        # relative to the start of the `Post Restore and save Nix store` phase
-        purge-last-accessed: 0
-        # except any version with the key that is the same as the `primary-key`
-        purge-primary-key: never
-
-    # not needed (yet)
-    # - uses: cachix/cachix-action@v12
-    #   with:
-    #     name: hyprland
-    #     authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-
-    - name: Build & Test
-      run: nix build .#${{ matrix.package }} --print-build-logs
-
+    if: (github.event_name != 'pull_request' || github.event.pull_request.head.repo.fork)
+    uses: hyprwm/actions/.github/workflows/nix.yml@main
+    secrets: inherit
+    with:
+      command: nix build .#${{ matrix.package }} --print-build-logs