From 62f9e688e66622ebc1cb545f48fa6c14653df029 Mon Sep 17 00:00:00 2001
From: Dan Burton <danburton.email@gmail.com>
Date: Sun, 19 Jun 2016 11:40:33 -0700
Subject: [PATCH] Add constraint "singletons < 2.2" per #1627

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 209fe78d..43183bd5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2285,6 +2285,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/1597
         - tagsoup < 0.14
+
+        # https://github.com/fpco/stackage/issues/1627
+        - singletons < 2.2
 # end of packages