These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.22 s (backtrack: 0/20).


The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by kde-plasma/kscreenlocker-6.8.0::gentoo
# required by =kde-plasma/kscreenlocker-6.8.0 (argument)
>=kde-frameworks/kconfig-6.31.0 qml
# required by kde-plasma/plasma-workspace-6.8.0::gentoo
# required by kde-plasma/kscreenlocker-6.8.0::gentoo
# required by =kde-plasma/kscreenlocker-6.8.0 (argument)
>=dev-qt/qt5compat-6.11.2 qml
# required by kde-plasma/plasma-workspace-6.8.0::gentoo
# required by kde-plasma/kscreenlocker-6.8.0::gentoo
# required by =kde-plasma/kscreenlocker-6.8.0 (argument)
>=dev-qt/qtbase-6.11.2-r2 wayland
# required by kde-plasma/plasma-workspace-6.8.0::gentoo
# required by kde-plasma/kscreenlocker-6.8.0::gentoo
# required by =kde-plasma/kscreenlocker-6.8.0 (argument)
>=kde-frameworks/prison-6.31.0 qml

!!! The ebuild selected to satisfy "sys-apps/accountsservice" has unmet requirements.
- sys-apps/accountsservice-26.27.3::gentoo USE="-doc -elogind -gtk-doc -introspection (-selinux) (-systemd) -test -vala -xcrypt"

  The following REQUIRED_USE flag constraints are unsatisfied:
    exactly-one-of ( elogind systemd )

(dependency required by "kde-plasma/plasma-workspace-6.8.0::gentoo[policykit]" [ebuild])
(dependency required by "kde-plasma/kscreenlocker-6.8.0::gentoo" [ebuild])
(dependency required by "=kde-plasma/kscreenlocker-6.8.0" [argument])