diff --git a/build-constraints.yaml b/build-constraints.yaml
index b6848ee8..cba23b19 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -288,6 +288,7 @@ packages:
         - xenstore
 
     "Chris Done @chrisdone":
+        - labels
         - ace
         - ical
         - check-email