From cd1aba088d68173c2676f5a3e7ad0f9fc104cc37 Mon Sep 17 00:00:00 2001
From: Dan Burton <danburton.email@gmail.com>
Date: Wed, 18 Oct 2017 22:14:47 -0700
Subject: [PATCH] Add constraint "either < 4.5" per #2971

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0ae91f51..42ae02b2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3456,6 +3456,9 @@ packages:
         # https://github.com/matt-noonan/justified-containers/issues/4
         - justified-containers < 0.2.0.0
 
+        # https://github.com/fpco/stackage/issues/2971
+        - either < 4.5
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of