diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0342b9f4..f63a9805 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -10,6 +10,9 @@ cabal-format-version: "3.0"
 # Constraints for brand new builds
 packages:
 
+    "Xy Ren <xy.r@outlook.com> @re-xyr":
+        - cleff
+
     "Janus Troelsen <ysangkok@gmail.com> @ysangkok":
         - ListZipper
         - rollbar