diff --git a/build-constraints.yaml b/build-constraints.yaml
index bfe61731..a2f2bbfa 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2700,6 +2700,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/2123
         - path < 0.5.10
+
+        # https://github.com/schell/varying/issues/15
+        - varying < 0.7.0.0
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of