ороблема окружения environment

Добрый день, проблема такая: как то давно была у меня на борту видеокарта VIA и поддерживалось это видеодрайвером от openchrome, затем её поменял и через месяц примерно emerge на попытку удаления какого либо пакета такую ошибку выдаёт:
locken ~ # emerge --unmerge sim

net-im/sim
selected: 0.9.4.3-r1
protected: none
omitted: none

>>> 'Selected' packages are slated for removal.
>>> 'Protected' and 'omitted' packages will not be removed.

>>> Waiting 5 seconds before starting...
>>> (Control-C to abort)...
>>> Unmerging in: 5 4 3 2 1
>>> Unmerging net-im/sim-0.9.4.3-r1...
/var/tmp/binpkgs/net-im/sim-0.9.4.3-r1/temp/environment: line 218: x11-base/xorg-server=-video_cards_via:
/var/tmp/binpkgs/net-im/sim-0.9.4.3-r1/temp/environment: line 5620: declare: `x11-base/xorg-server=-video_cards_via':
*
* ERROR: net-im/sim-0.9.4.3-r1 failed.
* Call stack:
* ebuild.sh, line 1641: Called die
* The specific snippet of code:
* preprocess_ebuild_env || \
* die "error processing environment"
* The die message:
* error processing environment
*
* If you need support, post the topmost build error, and the call stack if relevant.
* A complete build log is located at '/var/tmp/binpkgs/net-im/sim-0.9.4.3-r1/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/binpkgs/net-im/sim-0.9.4.3-r1/temp/environment'.
*
!!! FAILED prerm: 1
* The 'prerm' phase of the 'net-im/sim-0.9.4.3-r1' package has failed with
* exit value 1. The problem occurred while executing the ebuild located at
* '/var/db/pkg/net-im/sim-0.9.4.3-r1/sim-0.9.4.3-r1.ebuild'. If necessary,
* manually remove the ebuild in order to skip the execution of removal
* phases.

* Messages for package net-im/sim-0.9.4.3-r1:

*
* ERROR: net-im/sim-0.9.4.3-r1 failed.
* Call stack:
* ebuild.sh, line 1641: Called die
* The specific snippet of code:
* preprocess_ebuild_env || \
* die "error processing environment"
* The die message:
* error processing environment
*
* If you need support, post the topmost build error, and the call stack if relevant.
* A complete build log is located at '/var/tmp/binpkgs/net-im/sim-0.9.4.3-r1/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/binpkgs/net-im/sim-0.9.4.3-r1/temp/environment'.
*
* The 'prerm' phase of the 'net-im/sim-0.9.4.3-r1' package has failed with
* exit value 1. The problem occurred while executing the ebuild located at
* '/var/db/pkg/net-im/sim-0.9.4.3-r1/sim-0.9.4.3-r1.ebuild'. If necessary,
* manually remove the ebuild in order to skip the execution of removal
* phases.