From aed3d6990ddafc1ed47e139abea9f2739ea86e0f Mon Sep 17 00:00:00 2001
From: Luke Murphy <lukewm@riseup.net>
Date: Sat, 9 Sep 2017 20:24:12 +0200
Subject: [PATCH] Add constraint for llvm-hs (< 5.0.0).

Please see https://github.com/llvm-hs/llvm-hs/issues/137.
---
 build-constraints.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 8a486e25..851f5156 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3378,6 +3378,9 @@ packages:
         # https://github.com/fpco/stackage/issues/2832
         - io-streams < 1.5
 
+        # https://github.com/llvm-hs/llvm-hs/issues/137
+        - llvm-hs < 5.0.0
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of