diff --git a/build-constraints.yaml b/build-constraints.yaml
index 07682737..19c9f83d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2892,7 +2892,7 @@ packages:
         - butcher
         - czipwith
         - data-tree-print
-        - brittany
+        - brittany < 0 # via yaml-0.9.0 commercialhaskell/stackage#3823
 
     "Ryan Mulligan <ryan@ryantm.com> @ryantm":
         - HDBC-mysql