diff --git a/build-constraints.yaml b/build-constraints.yaml
index c47c9c1a..4ab2ddb5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2798,7 +2798,7 @@ packages:
         - butcher
         - czipwith
         - data-tree-print
-        - brittany
+        - brittany < 0 # via aeson-1.3.1.0
 
     "Ryan Mulligan <ryan@ryantm.com> @ryantm":
         - HDBC-mysql