! Some packages of ::gentoo have to be mask, thus we use a config file  package.mask/qrtools .

The folder  /etc/portage/qrtools.conf  will be created during the installation of utility?? and contains several config files.

•  excludes.conf : list of ebuilds which will be excluded by an  emerge –sync , one per line. Beware that these excludes will be used for all repositories (see this page in the Gentoo Handbook for details)

•  postsync.conf : This file will be read by the qrtools post sync hook

•  qrtconf.conf  : config file for the qrtconf utility

• rename ebuilds of ::gentoo.

Prefixes 'D:' (delete), 'R:' (rename), 'K:' (keep) (future: E - exclude from sync and delete if exist), 'P:' (patch ebuild, e.g. baselayout)

Example line:

R:mail-client/mailx
D:virtual/mailx
K:
P:sys-apps/baselayout

Invalid lines will be ignored.

This is sometimes useful if there is a replacement in ::qrtools. Renamed packages sty in the portage tree but have been renamed with the suffix '-qrt'. (example:  mail-client/mailx-qrt )

•  clean-up.conf : cleanup files and folder mostly under /etc and /var (post emerge hook)

:

QRT_SYNC_OPTS="--exclude-from=/etc/portage/qrtools.conf/excludes.conf"
PORTAGE_RSYNC_EXTRA_OPTS="${PORTAGE_RSYNC_EXTRA_OPTS} ${QRT_SYNC_OPTS}"

If something seems suspect  make.conf  will be stayed untouched and options have to be added by hand. It is maybe a good point of time to clean up your  make.conf  before you install qrtools.