# emerge -pvq firefox::gentoo
Unavailable repository 'calculate' referenced by masters entry in '/var/lib/layman/rasdark/metadata/layout.conf'
[ebuild     U ] www-client/firefox-61.0-r1 [60.0.2] USE="dbus gmp-autoupdate pulseaudio screenshot startup-notification -bindist* -custom-cflags -custom-optimization* -debug -eme-free -hardened -hwaccel -jack (-neon) (-selinux) -system-harfbuzz -system-icu -system-jpeg -system-libevent -system-libvpx -system-sqlite {-test} -wifi" L10N="de -ach -af -an -ar -as -ast -az -bg -bn-BD -bn-IN -br -bs -ca -cak -cs -cy -da -dsb -el -en-GB -en-ZA -eo -es-AR -es-CL -es-ES -es-MX -et -eu -fa -ff -fi -fr -fy -ga -gd -gl -gn -gu -he -hi -hr -hsb -hu -hy -id -is -it -ja -ka -kab -kk -km -kn -ko -lij -lt -lv -mai -mk -ml -mr -ms -nb -nl -nn -or -pa -pl -pt-BR -pt-PT -rm -ro -ru -si -sk -sl -son -sq -sr -sv -ta -te -th -tr -uk -uz -vi -xh -zh-CN -zh-TW" 

!!! The following installed packages are masked:
- dev-qt/qttranslations-4.8.7::gentoo (masked by: package.mask)
/usr/portage/profiles/package.mask:
# Andreas Sturmlechner <asturm@gentoo.org> (26 Jun 2018)
# Mask Qt4 for removal. Bug #631788

- dev-qt/qtgui-4.8.7::gentoo (masked by: package.mask)
- dev-qt/qt3support-4.8.7::gentoo (masked by: package.mask)
- app-eselect/eselect-qtgraphicssystem-1.1.1::gentoo (masked by: package.mask)
- dev-qt/qthelp-4.8.7::gentoo (masked by: package.mask)
- dev-qt/designer-4.8.7::gentoo (masked by: package.mask)
- dev-qt/qtsql-4.8.7-r1::gentoo (masked by: package.mask)
- dev-qt/linguist-4.8.7::gentoo (masked by: package.mask)
- dev-qt/qtcore-4.8.7-r4::gentoo (masked by: package.mask)
- dev-qt/qtscript-4.8.7::gentoo (masked by: package.mask)
- dev-qt/assistant-4.8.7::gentoo (masked by: package.mask)
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.