diff --git a/.gitea/workflows/format.yml b/.gitea/workflows/format.yml
new file mode 100644
index 0000000..9a12b12
--- /dev/null
+++ b/.gitea/workflows/format.yml
@@ -0,0 +1,22 @@
+name: nix CI format
+on:
+  push:
+    branches: [main]
+  pull_request:
+    types: [opened, reopened]
+
+jobs:
+  amd64:
+    runs-on: [ ubuntu-24.04, amd64-builder ]
+    steps:
+      - name: nix format
+        run: nix run nixpkgs#alejandra -- .
+
+#  arm64:
+#    runs-on : [ ubuntu-24.04, arm64-builder ]
+#    steps:
+#      - name: System Info
+#        run: |
+#          cat /etc/os-release
+#          echo
+#          uname -m