diff --git a/build-constraints.yaml b/build-constraints.yaml
index d708fac5..e9d16b05 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -6901,6 +6901,9 @@ packages:
       # https://github.com/commercialhaskell/stackage/issues/5959
       - attoparsec < 0.14.1
 
+      # https://github.com/commercialhaskell/stackage/issues/5960
+      - IPv6Addr < 2
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of