diff --git a/build-constraints.yaml b/build-constraints.yaml
index 41f37006..cbfbc430 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -817,7 +817,7 @@ packages:
         - type-operators
 
     "Sebastiaan Visser <haskell@fvisser.nl> @sebastiaanvisser":
-        - clay < 0 # GHC 8.4 BuildFailureException Process exited with ExitFailure 1: ./Setup build
+        - clay < 0 # build failure with GHC 8.4 https://github.com/sebastiaanvisser/clay/issues/171
         - fclabels
 
     "Robert Klotzner <robert.klotzner@gmx.at> @eskimor":