diff --git a/.gitea/workflows/renovate-config-check.yaml b/.gitea/workflows/renovate-config-check.yaml
new file mode 100644
index 0000000..4760413
--- /dev/null
+++ b/.gitea/workflows/renovate-config-check.yaml
@@ -0,0 +1,14 @@
+name: renovate config check
+
+on:
+  pull_request:
+
+jobs:
+  renovate-config-validator:
+    runs-on: ubuntu-latest
+    container: ghcr.io/renovatebot/renovate:37.305.0
+    steps:
+      - name: Checkout sources
+        uses: https://gitea.com/actions/checkout@v4
+      - name: Config check
+        run: renovate-config-validator $RENOVATE_CONFIG_VALIDATOR_EXTRA_FLAGS
diff --git a/default.json b/default.json
index bb7f092..870330e 100644
--- a/default.json
+++ b/default.json
@@ -1,5 +1,8 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": ["github>renovatebot/.github", ":dependencyDashboard"],
-  "prCreation": "immediate"
+  "prCreation": "immediate",
+  "nix": {
+    "enabled": false
+  }
 }