diff --git a/build-constraints.yaml b/build-constraints.yaml
index 72438d14..ea0b23e1 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3500,7 +3500,7 @@ packages:
         - hw-hedgehog
         - hw-hspec-hedgehog
         - hw-int
-        - hw-ip
+        - hw-ip < 0 # 2.4.2.1 requires hedgehog - but commenter isn't able to spot this
         - hw-json
         - hw-json-simple-cursor
         - hw-json-standard-cursor