diff --git a/build-constraints.yaml b/build-constraints.yaml
index ccdb4f1d..6f579c8f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3109,7 +3109,7 @@ packages:
         - butcher
         - czipwith
         - data-tree-print
-        - brittany
+        - brittany < 0.12 # https://github.com/lspitzner/brittany/issues/245
 
     "Ryan Mulligan <ryan@ryantm.com> @ryantm":
         - HDBC-mysql