diff --git a/build-constraints.yaml b/build-constraints.yaml
index 13ff590c..34438847 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1343,7 +1343,7 @@ packages:
         - hetzner
         - include-file
         - journalctl-stream
-        - mailtrap
+        - mailtrap < 0 # https://github.com/commercialhaskell/stackage/issues/7344
         - matrix
         - mysql-json-table
         - pcre-light