From a98ce596b9e6dd21fb14415e7dfbfc78d88a8876 Mon Sep 17 00:00:00 2001
From: Michael Snoyman <michael@snoyman.com>
Date: Thu, 16 Apr 2015 19:23:01 +0300
Subject: [PATCH] Upper bound for #537

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index acbb0ef5..6ff2710a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -918,6 +918,9 @@ packages:
         # https://github.com/fpco/stackage/issues/531
         - sbv < 4.3
 
+        # https://github.com/fpco/stackage/issues/537
+        - zlib < 0.6
+
 # Package flags are applied to individual packages, and override the values of
 # global-flags
 package-flags: