diff --git a/build-constraints.yaml b/build-constraints.yaml
index c59493f8..ee4b8973 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3665,6 +3665,7 @@ packages:
         - infinite-list
         - regression-simple
         - tasty-bench-fit
+        - alex-tools
 
     "Ashley Yakeley <ashley@semantic.org> @AshleyYakeley":
         - countable