Capistrano migration from Rails 3 to Rails 4

Months ago, I made the migration from Rails 3 to Rails 4. I had some troubles with my Capistrano deployments and I solved it by removing the old manifest.json. Just now, I'm trying to make a rollback of a deployment by using cap staging deploy:rollback but it fails because there is not any assets_manifest.*. That normal because the manifest's name is manifest.*.

How can I tell Capistrano which name it has to use?

I'm using :

Rails 4.2 Ruby 2.2 Capistrano 2.15.5 Sprockets 2.11.3