diff --git a/build-constraints.yaml b/build-constraints.yaml
index 04e71ddf..838319f0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -234,6 +234,7 @@ packages:
 
     "Chris Done":
         - ace
+        - ical
         - check-email
         - freenect
         - frisby