the new udisks requires libblockdev-2.18 which is not in portage yet. ! sys-libs/libblockdev Reasons: target (installed-packages::installed), sys-fs/udisks-2.7.7:2::gentoo Unsuitable candidates: * sys-libs/libblockdev-2.14-r1:0::gentoo Did not meet >=sys-libs/libblockdev-2.18[cryptsetup,lvm?], use existing if same metadata, installing to / from sys-fs/udisks-2.7.7:2::gentoo * sys-libs/libblockdev-2.17:0::gentoo Did not meet >=sys-libs/libblockdev-2.18[cryptsetup,lvm?], use existing if same metadata, installing to / from sys-fs/udisks-2.7.7:2::gentoo
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=5dd830257122d13f76d3a9a7f6c410a4f14cda79