diff --git a/build-constraints.yaml b/build-constraints.yaml
index 659e2c71..b05c8a80 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7829,6 +7829,9 @@ packages:
         - microlens-th < 0.4.3.18
         - parameterized-utils < 2.2.0.0
 
+        # https://github.com/commercialhaskell/stackage/issues/8089
+        - megaparsec < 9.8.1
+
         # https://github.com/commercialhaskell/stackage/issues/7857
         # QuickCheck < 2.17.0.0
         # quickcheck-instances < 0.4