--- a/.taskcluster.yml
+++ b/.taskcluster.yml
@@ -72,19 +72,21 @@ tasks:
               - "index.gecko.v2.${repository.project}.latest.taskgraph.decision-${cron.job_name}"
               - "index.gecko.v2.${repository.project}.latest.firefox.decision-${cron.job_name}"
 
       scopes:
         $if: 'tasks_for == "hg-push"'
         then:
           - 'assume:repo:${repoUrl[8:]}:branch:default'
           - 'queue:route:notify.email.${ownerEmail}.*'
+          - 'in-tree:hook-action:project-gecko/in-tree-action-${repository.level}-*'
         else:
           $if: 'tasks_for == "action"'
           then:
+            # when all actions are hooks, we can calculate this directly rather than using a variable
             - '${action.repo_scope}'
           else:
             - 'assume:repo:${repoUrl[8:]}:cron:${cron.job_name}'
 
       dependencies: []
       requires: all-completed
 
       priority: lowest