(chroot) archlinux / # emerge -vpN world

 * IMPORTANT: 2 config files in '/etc/portage' need updating.
 * See the CONFIGURATION FILES section of the emerge
 * man page to learn how to update config files.

These are the packages that would be merged, in order:

Calculating dependencies... done!

!!! The ebuild selected to satisfy "sys-fs/cryptsetup" has unmet requirements.
- sys-fs/cryptsetup-1.6.5::gentoo USE="gcrypt kernel nettle nls openssl python reencrypt static static-libs udev urandom" ABI_X86="64" PYTHON_SINGLE_TARGET="python2_7 -python3_3 -python3_4" PYTHON_TARGETS="python2_7 python3_3 -python3_4"

  The following REQUIRED_USE flag constraints are unsatisfied:
    exactly-one-of ( gcrypt kernel nettle openssl ) static? ( !gcrypt )

  The above constraints are a subset of the following complete expression:
    exactly-one-of ( gcrypt kernel nettle openssl ) python? ( exactly-one-of ( python_single_target_python3_3 python_single_target_python3_4 python_single_target_python2_7 ) python_single_target_python3_3? ( python_targets_python3_3 ) python_single_target_python3_4? ( python_targets_python3_4 ) python_single_target_python2_7? ( python_targets_python2_7 ) ) static? ( !gcrypt )

(dependency required by "sys-kernel/genkernel-3.4.49.2[cryptsetup]" [ebuild])
(dependency required by "@selected" [set])
(dependency required by "@world" [argument])