diff --git a/.forgejo/workflows/ci.yaml b/.forgejo/workflows/ci.yaml
index dc88fc01..6cf1b0da 100644
--- a/.forgejo/workflows/ci.yaml
+++ b/.forgejo/workflows/ci.yaml
@@ -65,3 +65,7 @@ jobs:
       - name: build xo-reflectutil
         run:
           nix-build ci.nix -A xo-reflectutil
+
+      - name: build xo-arena
+        run:
+          nix-build ci.nix -A xo-arena