diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index a74ebec..38a23de 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -53,7 +53,9 @@ jobs:
   # to unset BUILD_ON and build here again.
   github:
     if: ${{ vars.BUILD_ON == 'github' }}
-    runs-on: light
+    # Its own runner label with plenty of slots: this job only polls, but holds a slot
+    # for as long as the GitHub build takes, and must not starve the build runners.
+    runs-on: wait
     timeout-minutes: 150
     container:
       image: node:26-bookworm-slim@sha256:582460f614631b59b824ac6020533b9bf339c7fdf3a6d7db31abb6b4065f0212 # 26-bookworm-slim