root@wrk-station1 ~ # paludis -qD virtual/portage::installed_virtuals
* virtual/portage::installed_virtuals
    installed_virtuals: 0.24.2 2.1.3_rc5* {:0} 
    Build dependencies: 
                       (
                           sys-apps/portage
                       )
    Runtime dependencies: 
                       (
                           sys-apps/portage
                       )
    Virtual for:       sys-apps/portage-2.1.3_rc5::installed