node default {
    include stdlib

    stage { 'base_configuration': }
    stage { 'base_packages': }
    Stage["setup"]
      -> Stage['base_packages']
      -> Stage['base_configuration']
      -> Stage['main']
 
    class { 'base_packages':
      stage => "base_packages"
    }
    class { 'base_configuration':
      stage     => "base_configuration",
      code_path => "/etc/puppetlabs/code",
      device    => "/dev/sdb",
      hostname  => 'new.immae.eu',
    }
}