From 2a3c137e4a91c0c9a60e791aeda649bb2181b70e Mon Sep 17 00:00:00 2001
From: Alexey Zabelin <hello@alexeyzabelin.com>
Date: Wed, 17 Jun 2020 10:51:01 -0700
Subject: [PATCH] Disable witness, #5451

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

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4715a7ba..7cfbb717 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3152,7 +3152,7 @@ packages:
 
     "Ashley Yakeley <ashley@semantic.org> @AshleyYakeley":
         - countable
-        - witness
+        - witness < 0 # ghc 8.10.1 https://github.com/commercialhaskell/stackage/issues/5451
         - open-witness < 0 # MonadFail
 
     "Victor Denisov <denisovenator@gmail.com> @VictorDenisov":