github: Perform more extensive checks

.github/workflows/build.yml

@@ -4,6 +4,24 @@ on:
   workflow_dispatch:
 
 jobs:
+  check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v27
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - uses: cachix/cachix-action@v15
+        with:
+          name: traxys
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+      - run: nix build .#checks.x86_64-linux.launch
+      - run: nix profile install nixpkgs#nixos-rebuild
+      - run: nixos-rebuild build --flake .#ZeNixComputa
+      - run: nixos-rebuild build --flake .#gandalf
+      - run: home-manager build --flake .#"boyerq@thinkpad-nixos"
+
   load_packages:
     runs-on: ubuntu-latest
 
@@ -39,12 +57,11 @@ jobs:
           name: traxys
           authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
       - run: NIXPKGS_ALLOW_UNFREE=1 nix build --impure '.#${{ matrix.package }}'
-      - run: nix build .#checks.x86_64-linux.launch
 
   # This allows us to have a branch protection with matrix
   build-status:
     runs-on: ubuntu-latest
-    needs: [build]
+    needs: [build, check]
     if: always()
     steps:
       - name: Successful build