Oh, and @matschaffer, if you're not looking at the full diff, I think you'll find install is eventually called:

```ruby
      def librarian_install
        return unless File.exist? 'Cheffile'
        Chef::Log.debug("Installing Librarian cookbooks")
        Librarian::Action::Clean.new(librarian_env).run
        Librarian::Action::Resolve.new(librarian_env).run
        Librarian::Action::Install.new(librarian_env).run
      end
```