From 3bdb12e227b119675fc84fef8b8b2c62f9e330ac Mon Sep 17 00:00:00 2001
From: Michael Snoyman <michael@snoyman.com>
Date: Tue, 23 Jun 2015 08:12:48 +0300
Subject: [PATCH] Upper bound for #639

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index ca6309d5..ae42f868 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1140,6 +1140,9 @@ packages:
         # https://github.com/gtk2hs/gtk2hs/issues/109
         - gtk < 0.13.8
 
+        # https://github.com/fpco/stackage/issues/639
+        - mainland-pretty < 0.3
+
 # Package flags are applied to individual packages, and override the values of
 # global-flags
 package-flags: