diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9f7e83bb..9c2e5ea8 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4834,6 +4834,9 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/4829
         - safecopy < 0.10
 
+        # https://github.com/commercialhaskell/stackage/issues/4831
+        - first-class-families < 0.6
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of