switch to garnix ci for linux

.github/workflows/build.yml

@@ -1,22 +0,0 @@
-name: "Test"
-on:
-  pull_request:
-  push:
-    branches:
-      - master
-jobs:
-  build:
-    strategy:
-      matrix:
-        os: [ ubuntu-latest, macos-latest ]
-    runs-on: ${{ matrix.os }}
-    steps:
-    - uses: actions/checkout@v3
-      with:
-          # Nix Flakes doesn't work on shallow clones
-          fetch-depth: 0
-    - uses: cachix/install-nix-action@v21
-    - name: List flake structure
-      run: nix flake show
-    - name: Run tests
-      run: nix flake check -L

garnix.yaml

@@ -0,0 +1,5 @@
+builds:
+  include:
+  - '*.x86_64-linux.*'
+  - 'packages.aarch64-darwin.*'
+  - nixosConfigurations.*