From 778eab1edb003ba46e0d1dcef5f3d04278e4a700 Mon Sep 17 00:00:00 2001
From: Michael Snoyman <michael@snoyman.com>
Date: Fri, 29 May 2015 14:45:44 +0300
Subject: [PATCH] Upper bound for #610

---
 build-constraints.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index c262ee49..157b1f4d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1068,6 +1068,9 @@ packages:
         # https://github.com/fpco/stackage/issues/602
         - errors < 2
 
+        # https://github.com/fpco/stackage/issues/610
+        - either < 4.4
+
 # Package flags are applied to individual packages, and override the values of
 # global-flags
 package-flags: