From c82235ca103747fc5650dce5ccbce4784a695b2c Mon Sep 17 00:00:00 2001
From: Vladislav Zavialov <vlad.z.4096@gmail.com>
Date: Thu, 3 Aug 2017 03:07:09 +0300
Subject: [PATCH] Enable 'union' back

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 08a28098..72ddaa5d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1916,7 +1916,7 @@ packages:
     "Vladislav Zavialov <vlad.z.4096@gmail.com> @int-index":
         - transformers-lift
         - ether
-        # - union # GHC 8.2.1
+        - union
 
     "Stack Builders stackage@stackbuilders.com @stackbuilders":
         - atomic-write