From 16c131382313e1215097b7ecbac80ccebd42b8cd Mon Sep 17 00:00:00 2001
From: Mihai Maruseac <mihai.maruseac@gmail.com>
Date: Fri, 28 Jun 2019 17:49:16 -0700
Subject: [PATCH] Upper bound req (#4677)

---
 build-constraints.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index b6143091..790dfe1d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2447,7 +2447,7 @@ packages:
         # parser-combinators-tests # https://github.com/commercialhaskell/stackage/issues/4540
         - path
         - path-io
-        - req
+        - req < 2.1.0 # https://github.com/commercialhaskell/stackage/issues/4677
         - req-conduit
         - stache
         - tagged-identity