diff --git a/build-constraints.yaml b/build-constraints.yaml
index 5f0194fc..f00297fe 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2590,6 +2590,7 @@ packages:
         - network-messagepack-rpc
         - network-messagepack-rpc-websocket < 0
         - unicode-show
+        - deriveJsonNoPrefix
 
     "Hans-Christian Esperer <hc@hcesperer.org> @hce":
         - avwx