From 22c21eaef240384ae13c9719ce7318c0d04a29b2 Mon Sep 17 00:00:00 2001
From: Jens Petersen <juhpetersen@gmail.com>
Date: Tue, 17 May 2016 09:58:11 +0900
Subject: [PATCH] singletons < 2.1 (#1451)

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4dc2bbb2..4e4f9b58 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2272,6 +2272,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/1449
         - bytestring-builder < 0.10.8.1.0
+
+        # https://github.com/fpco/stackage/issues/1451
+        - singletons < 2.1
 # end of packages