diff --git a/build-constraints.yaml b/build-constraints.yaml
index 74158342..111ed660 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -366,7 +366,7 @@ packages:
 
     "Tom McLaughlin <tom@codedown.io> @thomasjm":
         - aeson-typescript
-        - fsnotify
+        - fsnotify < 0.4  # https://github.com/commercialhaskell/stackage/issues/6715
         - sandwich
         - sandwich-quickcheck
         - sandwich-slack