diff --git a/build-constraints.yaml b/build-constraints.yaml
index acd0c2a5..5a37ca53 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2185,9 +2185,6 @@ packages:
         # https://github.com/fpco/stackage/issues/1351
         - webkitgtk3-javascriptcore < 0.14.0.0
 
-        # https://github.com/snoyberg/classy-prelude/issues/124
-        - mono-traversable < 0.10.2
-
 # end of packages