diff --git a/build-constraints.yaml b/build-constraints.yaml
index 978e2147..72321ad1 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2636,7 +2636,7 @@ packages:
         - password
         - password-instances
         - password-types
-        - pretty-simple
+        - pretty-simple < 4.1 # https://github.com/commercialhaskell/stackage/issues/6519
         - print-console-colors
         - read-env-var
         - servant-checked-exceptions