From 2575b46391292e735f16e4ffff1d97f7f00446e2 Mon Sep 17 00:00:00 2001
From: Dan Burton <danburton.email@gmail.com>
Date: Mon, 22 Oct 2018 11:04:55 -0400
Subject: [PATCH] Add constraint "hsinstall < 2" per #4067

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index f518e834..4d90bb89 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4468,6 +4468,9 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/4066
         - generics-sop < 0.4.0.0
 
+        # https://github.com/commercialhaskell/stackage/issues/4067
+        - hsinstall < 2
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of