Disclaimer: this bug has been filed in a semi-automated manner. When emerging the package kde-base/ark-4.8.5, the following elog messages are displayed: * For creating rar archives, install app-arch/rar Such messages should only be displayed when the package is a new install. These situations can be checked in the ebuild as follows: if ! has_version 'kde-base/ark'; then See the tracker bug 440214 for more details.
Has nothing to do with whether package is new install.
This should be done in a more general way: we need to agree on a way to get needed unpackagers installed, probably a virtual :/ *** This bug has been marked as a duplicate of bug 356539 ***