diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
new file mode 100644
index 0000000..47cd2ae
--- /dev/null
+++ b/.gitea/workflows/ci.yml
@@ -0,0 +1,18 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: johno/gitea-actions/nix-setup@main
+
+      - name: Check flake
+        run: nix flake check