From 5861b1144f776647370fdc108e8ea34a4aece6eb Mon Sep 17 00:00:00 2001
From: Michael Snoyman <michael@snoyman.com>
Date: Tue, 5 Jan 2016 19:53:06 +0200
Subject: [PATCH] Upper bound for #1102

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index c896c58c..b6ba0a7f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1881,6 +1881,9 @@ packages:
         # https://github.com/fpco/stackage/issues/1098
         - tar < 0.4.3.0
 
+        # https://github.com/fpco/stackage/issues/1102
+        - async < 2.1
+
 # end of packages