# emerge -avuDN system

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

Calculating dependencies... done!

!!! The ebuild selected to satisfy ">=kde-base/kdelibs-4.4:4[aqua=]" has unmet requirements.
- kde-base/kdelibs-4.14.0::gentoo USE="acl alsa bzip2 fam handbook jpeg2k lzma mmx nls opengl policykit spell sse sse2 ssl udisks upower zeroconf -3dnow (-altivec) (-aqua) -debug -doc -kerberos -nepomuk -openexr -test -udev"

  The following REQUIRED_USE flag constraints are unsatisfied:
    udisks? ( udev ) upower? ( udev )

(dependency required by "sys-auth/polkit-kde-agent-0.99.0-r1" [installed])
(dependency required by "sys-auth/polkit-0.112-r2[kde]" [installed])
(dependency required by "sys-auth/consolekit-0.4.6[policykit]" [installed])
(dependency required by "sys-auth/pambase-20140313[consolekit]" [ebuild])
(dependency required by "sys-apps/openrc-0.13[pam]" [ebuild])
(dependency required by "@system" [argument])