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":