diff --git a/build-constraints.yaml b/build-constraints.yaml
index 11b19e5e..64a82c75 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1832,6 +1832,7 @@ packages:
         - github-release
         - json-feed
         - lackey
+        - list-singleton
         - ratel
         - ratel-wai
         - rattletrap