cat /etc/portage/package.unmask

# cat /etc/portage/package.unmask
# required by xfce4-mixer (argument)
# /var/git/meta-repo/kits/core-kit/profiles/package.mask/00-gentoo:
# Michał Górny <[email protected]> (21 Aug 2017)
# xfce4-mixer is discontinued upstream and no longer considered part
# of the DE since 4.12. It requires vulnerable gstreamer:0.10, and no
# longer builds with the development versions of core Xfce4 components.
# The suggested replacement is xfce-extra/xfce4-pulseaudio-plugin.
# Removal in 30 days. Bug #628424.
=xfce-extra/xfce4-mixer-4.11.0
=media-sound/audacious-3.7.1-r1
=app-emulation/wine-2.3

# required by dev-cpp/libcmis-0.5.2_pre20160820-r1::dev-kit
# required by app-office/libreoffice-5.4.2.2::kde-kit
# required by @selected
# required by @world (argument)
# /etc/portage/package.mask:
=dev-libs/boost-1.62.0-r1