Calculating dependencies... done!
[ebuild  N     ] sys-kernel/debian-sources-3.19.3:3.19.3::gentoo  USE="binary -rt" 81,293 KiB
[ebuild  N     ] virtual/linux-sources-2.6::gentoo  USE="-hardened" 0 KiB
[ebuild  N     ] sys-kernel/spl-0.6.5.3::gentoo  USE="-custom-cflags -debug" 544 KiB
[ebuild  N     ] sys-fs/zfs-kmod-0.6.5.3::gentoo  USE="rootfs -custom-cflags -debug" 2,466 KiB
[ebuild  N     ] sys-fs/zfs-0.6.5.3::gentoo  USE="rootfs -custom-cflags -debug (-kernel-builtin) -static-libs -test-suite" PYTHON_TARGETS="python2_7 python3_3 -python3_4 -python3_5" 0 KiB
[blocks B      ] >=sys-fs/udev-init-scripts-28 (">=sys-fs/udev-init-scripts-28" is blocking sys-fs/zfs-0.6.5.3)

Total: 5 packages (5 new), Size of downloads: 84,301 KiB
Conflict: 1 block (1 unsatisfied)

 * Error: The above package list contains packages which cannot be
 * installed at the same time on the same system.

  (sys-fs/zfs-0.6.5.3:0/0::gentoo, ebuild scheduled for merge) pulled in by
    zfs

  (sys-fs/udev-init-scripts-30:0/0::gentoo, installed) pulled in by
    >=sys-fs/udev-init-scripts-26 required by (sys-fs/eudev-3.1.5:0/0::gentoo, installed)