diff --git a/build-constraints.yaml b/build-constraints.yaml
index 91470fb8..94c71cbe 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2502,6 +2502,7 @@ packages:
         - NineP
         - Network-NineP
         - pontarius-xmpp
+        - stringprep
 
     "Antoni Silvestre <antoni.silvestre@gmail.com> @asilvestre":
         # Test suite needs a running neo4j server with auth disabled