From 314aa30c7cbf3b68ee02062563f43fa0d0ba046b Mon Sep 17 00:00:00 2001
From: Chris Dornan <chris@chrisdornan.com>
Date: Fri, 2 Jun 2017 00:00:41 +0100
Subject: [PATCH] singletons < 2.3, th-desugar < 1.7 (#2557)

---
 build-constraints.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 20401c1c..3228cdcb 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3212,6 +3212,10 @@ packages:
         # https://github.com/fpco/stackage/issues/2555
         - streaming-commons < 0.1.18
 
+        # https://github.com/fpco/stackage/issues/2557
+        - singletons < 2.3
+        - th-desugar < 1.7
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of