xz-utils и другие...

Не происходит обновление. Весь интернет перерыл... решения ненашел.

#emerge --update --newuse --deep --with-bdeps=y @world
...
checking for a shell that conforms to POSIX... /bin/sh

Initializing Automake:
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... configure: error: newly created file is older than distributed files!
Check your system clock

!!! Please attach the following file when seeking support:
!!! /var/tmp/portage/app-arch/xz-utils-5.0.3/work/xz-5.0.3/config.log
 * ERROR: app-arch/xz-utils-5.0.3 failed (configure phase):
 *   econf failed
 * 
 * Call stack:
 *          ebuild.sh, line   75:  Called src_configure
 *        environment, line 2102:  Called econf '--enable-nls' '--enable-threads' '--disable-static'
 *   phase-helpers.sh, line  467:  Called die
 * The specific snippet of code:
 *   			die "econf failed"
 * 
 * If you need support, post the output of 'emerge --info =app-arch/xz-utils-5.0.3',
 * the complete build log and the output of 'emerge -pqv =app-arch/xz-utils-5.0.3'.
 * The complete build log is located at '/var/tmp/portage/app-arch/xz-utils-5.0.3/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/app-arch/xz-utils-5.0.3/temp/environment'.
 * S: '/var/tmp/portage/app-arch/xz-utils-5.0.3/work/xz-5.0.3'

>>> Failed to emerge app-arch/xz-utils-5.0.3, Log file:

>>>  '/var/tmp/portage/app-arch/xz-utils-5.0.3/temp/build.log'

 * Messages for package app-arch/xz-utils-5.0.3:

 * ERROR: app-arch/xz-utils-5.0.3 failed (configure phase):
 *   econf failed
 * 
 * Call stack:
 *          ebuild.sh, line   75:  Called src_configure
 *        environment, line 2102:  Called econf '--enable-nls' '--enable-threads' '--disable-static'
 *   phase-helpers.sh, line  467:  Called die
 * The specific snippet of code:
 *   			die "econf failed"
 * 
 * If you need support, post the output of 'emerge --info =app-arch/xz-utils-5.0.3',
 * the complete build log and the output of 'emerge -pqv =app-arch/xz-utils-5.0.3'.
 * The complete build log is located at '/var/tmp/portage/app-arch/xz-utils-5.0.3/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/app-arch/xz-utils-5.0.3/temp/environment'.
 * S: '/var/tmp/portage/app-arch/xz-utils-5.0.3/work/xz-5.0.3'

 * IMPORTANT: 1 news items need reading for repository 'gentoo'.
 * Use eselect news to read news items.
...

Но вот при помощи ebuild xz-utils-9999.ebuild все прошло без ошибок.
Такие проблемы у меня появляются часто не только с этой утилитой. Как такими проблемами бороться??? Пропустить пакет чтоли, но как это сделать я тоже незнаю???
В итоге постоянно приходиться переустанавливать gentoo.