From 921ee19e85c1af5608c93a8a8424a04458c235cd Mon Sep 17 00:00:00 2001
From: Jens Petersen <juhpetersen@gmail.com>
Date: Tue, 4 Apr 2017 19:10:03 +0900
Subject: [PATCH] IPv6Addr < 1.0.0 (#2421)

---
 build-constraints.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 8e90f1af..54174507 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3046,6 +3046,8 @@ packages:
         # https://github.com/fpco/stackage/issues/2400
         - hslua < 0.5
 
+        # https://github.com/fpco/stackage/issues/2421
+        - IPv6Addr < 1.0.0
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of