diff --git a/build-constraints.yaml b/build-constraints.yaml
index 3db86342..10a1cbd5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3295,6 +3295,9 @@ packages:
         # https://github.com/fpco/stackage/issues/2635
         - cryptonite < 0.24
 
+        # https://github.com/fpco/stackage/issues/2646
+        - cron < 0.6
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of