Split Linux and macOS builds

.github/workflows/build.yml

@@ -5,11 +5,22 @@ on:
     branches: ['master']
 
 jobs:
-  build:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [macos-latest, ubuntu-latest]
+  build-x86_64-linux:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: cachix/install-nix-action@v16
+      with:
+        nix_path: nixpkgs=channel:nixpkgs-unstable
+    - uses: cachix/cachix-action@v10
+      with:
+        name: nifoc
+        signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+    - run: nix build '.#proximity-sort'
+    - run: nix build '.#q'
+
+  x86_64-darwin:
+    runs-on: macos-latest
     steps:
     - uses: actions/checkout@v3
     - uses: cachix/install-nix-action@v16
@@ -20,5 +31,6 @@ jobs:
         name: nifoc
         signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
     - run: nix build '.#cliclick'
+    - run: nix build '.#phantomjs'
     - run: nix build '.#proximity-sort'
     - run: nix build '.#q'