bundle exec cap staging evolve:up:db doesn't work

```
bundle exec cap staging evolve:up:db
cap aborted!
Don't know how to build task 'evolve:up:db'
/Library/Ruby/Gems/2.0.0/gems/capistrano-3.2.1/lib/capistrano/application.rb:15:in `run'
/Library/Ruby/Gems/2.0.0/gems/capistrano-3.2.1/bin/cap:3:in `<top (required)>'
/usr/bin/cap:23:in `load'
/usr/bin/cap:23:in `<main>'
(See full trace by running task with --trace)
```

Let me know if you want the full trace