diff --git a/build-constraints.yaml b/build-constraints.yaml
index 413d464e..17cb91de 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2811,7 +2811,7 @@ packages:
         - html-entity-map
         - identicon
         - lame
-        - megaparsec
+        - megaparsec < 9.3  # https://github.com/commercialhaskell/stackage/issues/6792
         - megaparsec-tests
         - mmark
         - mmark-cli