diff --git a/.gitea/workflows/validate-flux.yaml b/.gitea/workflows/validate-flux.yaml
new file mode 100644
index 0000000..20bb552
--- /dev/null
+++ b/.gitea/workflows/validate-flux.yaml
@@ -0,0 +1,21 @@
+name: Validate Flux manifests
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+jobs:
+  kustomize-build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install kustomize
+        run: |
+          curl -sL "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | bash
+          sudo mv kustomize /usr/local/bin/
+
+      - name: kustomize build flux/
+        run: kustomize build flux/ > /dev/null