diff --git a/build-constraints.yaml b/build-constraints.yaml
index 688f2ed5a..61ce43532 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4555,7 +4555,7 @@ packages:
         - webgear-swagger-ui
 
     "Alex Washburn <github@recursion.ninja> @recursion-ninja":
-        - bv-little
+        - bv-little < 0 # needs mono-traversable-keys
         - mono-traversable-keys
 
     "Avi Press <mail@avi.press> @aviaviavi":