As the title informs leaving no doubts, I have created a separate package that provides support for archiving options (via app-arch/file-roller) in Nautilus.
It's made by creating gnome-extra/nautilus-file-roller and modifying app-arch/file-roller ebuild. Purpose: to get rid of the dependency on Nautilus for this good archiver. So you can use File Roller as the default archiver in the Xfce edition if you want (but keep in mind it uses Gtk+ 3). If these packages are okay (not in Limbo yet…), what probably needs to be done: add gnome-extra/nautilus-file-roller to ./molecules/gnome.common. Cheers.
