diff --git a/build-constraints.yaml b/build-constraints.yaml
index a712b337..897446bc 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2028,6 +2028,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/1250
         - pretty-compact < 2.0
+
+        # https://github.com/fpco/stackage/issues/1257
+        - megaparsec < 4.4
 # end of packages