diff --git a/build-constraints.yaml b/build-constraints.yaml
index 77ee1330..47b4d3d2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1998,6 +1998,9 @@ packages:
         - distributed-process < 0.6.0
         - distributed-process-tests < 0.4.4
 
+        # https://github.com/fpco/stackage/issues/1237
+        - megaparsec < 4.4.0
+
 # end of packages