this is generic message. the package is still using dead code which might get out of duty anytime soon.
please update from udisks:0 to udisks:2.
It isn't using udisks code at all, it seems. It does all kinds of weird stuff through dbus in ./src/filesystem/e2_devkit.c, though.
the current emelfm2 ebuilds are mess/broken regarding devicekit (= udisks) support again... i'll try to clean them up... give me few days... there is udisks2 support
+*emelfm2-0.9.1-r1 (04 Jul 2015)
+ 04 Jul 2015; Pacho Ramos <firstname.lastname@example.org> +emelfm2-0.9.1-r1.ebuild,
+ -emelfm2-0.8.2.ebuild, -emelfm2-0.9.0.ebuild:
+ Allow to use udisks-2 (#439628), drop old