diff --git a/build-constraints.yaml b/build-constraints.yaml
index 6640116d..9f3b5bef 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2692,7 +2692,7 @@ packages:
         - hw-bits
         - hw-conduit
         - hw-diagnostics
-        - hw-json
+        # - hw-json       # https://github.com/haskell-works/hw-json/issues/6
         - hw-parser
         - hw-prim
         - hw-rankselect