diff --git a/.gitea/workflows/push.yaml b/.gitea/workflows/push.yaml
index 4a4500c..1fc0117 100644
--- a/.gitea/workflows/push.yaml
+++ b/.gitea/workflows/push.yaml
@@ -75,11 +75,9 @@ jobs:
           path: target/doc
 
   nix-build:
-    runs-on: ubuntu-latest
+    runs-on: nix
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
-      - name: Set up Nix
-        uses: cachix/install-nix-action@v27
       - name: Build project with Nix
-        run: nix build --option sandbox true --experimental-features 'nix-command flakes' .#default
+        run: nix build --experimental-features 'nix-command flakes'