
Problem shown by using __rbenv:

__rbenv/nicotest
    __git /home/nico/.rbenv
        __package git
        __directory /home/nico/.rbenv

    require="__git/home/nico/.rbenv" 
        __git /home/nico/.rbenv/plugins/ruby-build
            __package git
            __directory /home/nico/.rbenv/plugins/ruby-build


1) if children do NOT automatically depend on their parents requiremnts

    __directory /home/nico/.rbenv/plugins/ruby-build fails:
        because __directory /home/nico/.rbenv/plugins is created by
        __git /home/nico/.rbenv, but __directory /home/nico/.rbenv/plugins/ruby-build
        does not depend on __git /home/nico/.rbenv

2) if children DO automatically depend on their parents requiremnts
    __package git from __git /home/nico/.rbenv/plugins/ruby-build depends on __git /home/nico/.rbenv.

    __git  /home/nico/.rbenv depends on __package git (via autorequire)

    => circular dependency, they depend on each other
