From 704cd1206bca184d5c904d58a45ca2d56bb7b39d Mon Sep 17 00:00:00 2001
From: Jens Petersen <juhpetersen@gmail.com>
Date: Tue, 19 Dec 2017 13:01:20 +0900
Subject: [PATCH] rank2classes testsuite fails (#3122)

> /tmp/stackage-build12/rank2classes-1.0$ dist/build/doctests/doctests
<no location info>: error: can't find file: test/README.lhs
---
 build-constraints.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index b4872260..815525d5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -598,7 +598,7 @@ packages:
         - incremental-parser
         - monoid-subclasses
         - picoparsec
-        - rank2classes
+        # - rank2classes # doctest https://github.com/fpco/stackage/pull/3122
 
     "Brent Yorgey <byorgey@gmail.com> @byorgey":
         - active