diff --git a/build-constraints.yaml b/build-constraints.yaml
index 8240c252..fe7d8b61 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3405,6 +3405,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/2894
         - marvin < 0.2.4
+
+        # https://github.com/fpco/stackage/issues/2893
+        - megaparsec < 6.2.0
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of