diff --git a/build-constraints.yaml b/build-constraints.yaml
index 85ffd6f9..cfd8d126 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4795,6 +4795,7 @@ packages:
         - cassava
         - contiguous
         - pwstore-fast
+        - rex
         - run-st
         - zigzag