# emerge kde-plasma/plasma-meta -p
...
The following USE changes are necessary to proceed:
(see "package.use" in the portage(5) man page for more details)
# required by kde-plasma/plasma-pa-5.12.5::gentoo
# required by kde-plasma/plasma-desktop-5.12.5-r1::gentoo[pulseaudio]
# required by kde-plasma/plasma-meta-5.12.5::gentoo
# required by kde-plasma/plasma-meta (argument)
>=media-sound/pulseaudio-11.1-r1 gnome