From f2c4321d95428a5567f989d1e8974564e71877d5 Mon Sep 17 00:00:00 2001
From: Mihai Maruseac <mihai.maruseac@gmail.com>
Date: Fri, 12 Mar 2021 18:59:26 -0800
Subject: [PATCH] Upper bound `singletons` (#5924)

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9897b729..c7c72c51 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -6892,6 +6892,9 @@ packages:
 
       # https://github.com/commercialhaskell/stackage/issues/5923
       - singleton-nats < 0.4.6
+
+      # https://github.com/commercialhaskell/stackage/issues/5924
+      - singletons
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of