diff --git a/build-constraints.yaml b/build-constraints.yaml
index e181b407..7293e6b9 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4880,6 +4880,7 @@ packages:
     "Benjamin Orchard <thefirstmuffinman@gmail.com> @raehik":
         - flatparse
         - strongweak
+        - mason
 
     "Grandfathered dependencies":
         - BiobaseNewick