«Сломался» emerge? [ЗАРЫТО]

Здравы будьте!
при попытке emerge <любой_пакет> получаю такое:

>>> Emerging (1 of 1) sys-apps/coreutils-8.25::gentoo
* coreutils-8.25.tar.xz SHA256 SHA512 WHIRLPOOL size ;-) ... [ ok ]
* coreutils-8.25-patches-1.1.tar.xz SHA256 SHA512 WHIRLPOOL size ;-) ... [ ok ]
* coreutils-8.25-man.tar.xz SHA256 SHA512 WHIRLPOOL size ;-) ... [ ok ]
/usr/lib/portage/bin/phase-functions.sh: line 234: 9841 Segmentation fault (core dumped) install -m${PORTAGE_WORKDIR_MODE:-0700} -d "${WORKDIR}"
* ERROR: sys-apps/coreutils-8.25::gentoo failed (unpack phase):
* Failed to create dir '/var/portage/tmp/portage/sys-apps/coreutils-8.25/work'
*
* Call stack:
* ebuild.sh, line 767: Called __ebuild_main 'unpack'
* phase-functions.sh, line 1007: Called __dyn_unpack
* phase-functions.sh, line 240: Called die
* The specific snippet of code:
* install -m${PORTAGE_WORKDIR_MODE:-0700} -d "${WORKDIR}" || die "Failed to create dir '${WORKDIR}'"
*
* If you need support, post the output of `emerge --info '=sys-apps/coreutils-8.25::gentoo'`,
* the complete build log and the output of `emerge -pqv '=sys-apps/coreutils-8.25::gentoo'`.
* The complete build log is located at '/var/portage/tmp/portage/sys-apps/coreutils-8.25/temp/build.log'.
* The ebuild environment file is located at '/var/portage/tmp/portage/sys-apps/coreutils-8.25/temp/environment'.
* Working directory: '/var/portage/tmp/portage/sys-apps/coreutils-8.25/homedir'
* S: '/var/portage/tmp/portage/sys-apps/coreutils-8.25/work/coreutils-8.25'

* ERROR: sys-apps/coreutils-8.25::gentoo failed (unpack phase):
* Failed to create dir '/var/portage/tmp/portage/sys-apps/coreutils-8.25/work'
*
* Call stack:
* ebuild.sh, line 767: Called __ebuild_main 'unpack'
* phase-functions.sh, line 1007: Called __dyn_unpack
* phase-functions.sh, line 240: Called die
* The specific snippet of code:
* install -m${PORTAGE_WORKDIR_MODE:-0700} -d "${WORKDIR}" || die "Failed to create dir '${WORKDIR}'"
*
* If you need support, post the output of `emerge --info '=sys-apps/coreutils-8.25::gentoo'`,
* the complete build log and the output of `emerge -pqv '=sys-apps/coreutils-8.25::gentoo'`.
* The complete build log is located at '/var/portage/tmp/portage/sys-apps/coreutils-8.25/temp/build.log'.
* The ebuild environment file is located at '/var/portage/tmp/portage/sys-apps/coreutils-8.25/temp/environment'.
* Working directory: '/var/portage/tmp/portage/sys-apps/coreutils-8.25/homedir'
* S: '/var/portage/tmp/portage/sys-apps/coreutils-8.25/work/coreutils-8.25'

Не может создвть папку "work". Причём сами по себе утилиты coreutils (cp, mv, rm и пр.) выполняются нормально, корятся только в контексте emerge.
Произошло внезапно. Куда ещё копнуть?
Благодарю.
UPD: dmesg сообщил такое:
install[9841]: segfault at 7f693d5cec38 ip 00007f69368b3865 sp 00007ffd9e2da1d0 error 4 in libsandbox.so[7f69368ac000+14000]

UPD: Вручную собрал sandbox, разложил sanbox,libsandbox.so по местам.