From ba654a72ed887da5bb2d60f4103dd19bfe5ddf7f Mon Sep 17 00:00:00 2001
From: Dan Burton <danburton.email@gmail.com>
Date: Fri, 24 Jun 2016 17:19:30 -0700
Subject: [PATCH] Add constraint "semigroups < 0.18.2" per #1645

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 7e135510..989d6590 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2287,6 +2287,9 @@ packages:
         # https://github.com/fpco/stackage/issues/1597
         - tagsoup < 0.14
 
+        # https:/github.com/fpco/stackage/issues/1645
+        - semigroups < 0.18.2
+
 # end of packages