From 6fb1ac538c7cdd1922ae71c8ceaa811c4835f0c7 Mon Sep 17 00:00:00 2001
From: Yoshikuni Jujo <PAF011432[at]nifty.ne.jp>
Date: Wed, 9 May 2018 12:25:49 +0900
Subject: [PATCH] add exception-hierarchy

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index fcb58a40..faa96f2e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2532,6 +2532,7 @@ packages:
         - xturtle < 0 # GHC 8.4 via yjsvg
         - gluturtle < 0 # build failure with GHC 8.4
         - papillon
+        - exception-hierarchy
 
     "Jan Gerlinger <git@jangerlinger.de> @JanGe":
         - irc-dcc