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

Calculating dependencies ... done!
Dependency resolution took 1.13 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 gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=sys-auth/polkit-126-r3 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=x11-libs/gdk-pixbuf-2.44.8 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=x11-libs/gtk+-3.24.52 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=x11-libs/libnotify-0.8.8 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=x11-libs/pango-1.58.2 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=x11-libs/xapp-3.2.3 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=x11-wm/muffin-6.6.3 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo[networkmanager]
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=net-misc/networkmanager-1.58.1-r3 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=app-i18n/ibus-1.5.34-r2 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=dev-libs/keybinder-0.3.2-r300 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=media-libs/graphene-1.10.8-r1 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=net-libs/libsoup-3.6.6 introspection
# required by gnome-extra/cinnamon-6.6.9::gentoo
# required by =gnome-extra/cinnamon-6.6.9 (argument)
>=sys-apps/accountsservice-26.27.3 introspection

!!! The ebuild selected to satisfy "sys-apps/accountsservice[introspection]" 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 "gnome-extra/cinnamon-6.6.9::gentoo" [ebuild])
(dependency required by "=gnome-extra/cinnamon-6.6.9" [argument])