$ cat livcd.pp

node default {
  contain roles::foo_box
}

class roles::foo_box {
  include profiles::base
  include profiles::dev
  Class['profiles::base'] -> Class['profiles::dev']
}

class profiles::dev {
}

class profiles::base {
  contain foobar
}

class foobar {
  notify { 'YAHOOO': }
}


$ puppet apply livcd.pp
Notice: Compiled catalog for tamborine.corp.puppetlabs.net in environment production in 0.05 seconds
Notice: YAHOOO
Notice: /Stage[main]/Foobar/Notify[YAHOOO]/message: defined 'message' as 'YAHOOO'
Notice: Applied catalog in 0.02 seconds