revert runner back to native

.gitea/workflows/validate-nixos-config.yml

@@ -8,15 +8,25 @@ on:
     branches:
       - main  # Adjust this to match your main branch name
 
+env:
+  PATH: /run/current-system/sw/bin:$PATH
+  
 jobs:
-  test:
+  validate:
-    runs-on: ubuntu-latest
+    runs-on: native
-    container:
-      image: ubuntu
-      options: --cap-add=NET_RAW --cap-add=NET_ADMIN
     steps:
-      - name: Install and run ping
+      - name: Debug environment
         run: |
-          cat /etc/resolv.conf
+          echo $PATH
-          apt-get update && apt-get install -y iputils-ping
+          which nix || echo "Nix not found"
-          ping -c 4 google.com
+
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Validate NixOS configuration
+        run: |
+          node --version
+          nix flake check
+          nix build .#nixosConfigurations.nixbox.config.system.build.toplevel --dry-run
+        env:
+          NIX_CONFIG: "experimental-features = nix-command flakes"