From e3ff2479808dab0eb08e51781ce169967459300c Mon Sep 17 00:00:00 2001
From: Michael Snoyman <michael@snoyman.com>
Date: Mon, 5 Jan 2015 16:44:17 +0200
Subject: [PATCH] Upper bound for #398

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 73fd4251..1b4d7a9f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -660,6 +660,9 @@ packages:
         # for language-ecmascript as well.
         - language-ecmascript < 0.17
 
+        # https://github.com/fpco/stackage/issues/398
+        - monoid-subclasses < 0.4
+
 # Package flags are applied to individual packages, and override the values of
 # global-flags
 package-flags: