emerge -av kdemultimedia --newuse
These are the packages that would be merged, in order:
Calculating dependencies... done!
[ebuild N ] media-libs/akode-2.0.1-r1 USE="alsa flac mp3 vorbis -jack -oss -speex" 454 kB
[ebuild N ] kde-base/kdemultimedia-3.5.7 USE="alsa encode flac mp3 vorbis xinerama -akode -arts -audiofile -debug -gstreamer -kdeenablefinal -theora -xine" 0 kB
[blocks B ] =kde-base/kmix-3.5* (is blocking kde-base/kdemultimedia-3.5.7)
[blocks B ] =kde-base/kscd-3.5* (is blocking kde-base/kdemultimedia-3.5.7)
[blocks B ] =kde-base/kaudiocreator-3.5* (is blocking kde-base/kdemultimedia-3.5.7)
[blocks B ] =kde-base/kdemultimedia-kioslaves-3.5* (is blocking kde-base/kdemultimedia-3.5.7)
[blocks B ] =kde-base/kdemultimedia-3.5* (is blocking kde-base/libkcddb-3.5.7, kde-base/kdemultimedia-kappfinder-data-3.5.7, kde-base/kscd-3.5.7, kde-base/kaudiocreator-3.5.7, kde-base/kmix-3.5.7, kde-base/kmid-3.5.7, kde-base/kdemultimedia-kioslaves-3.5.7, kde-base/kdemultimedia-kfile-plugins-3.5.7)
[blocks B ] =kde-base/kdemultimedia-kfile-plugins-3.5* (is blocking kde-base/kdemultimedia-3.5.7)
[blocks B ] =kde-base/kmid-3.5* (is blocking kde-base/kdemultimedia-3.5.7)
[blocks B ] =kde-base/kdemultimedia-kappfinder-data-3.5* (is blocking kde-base/kdemultimedia-3.5.7)
[blocks B ] =kde-base/libkcddb-3.5* (is blocking kde-base/kdemultimedia-3.5.7)
Total: 2 packages (2 new, 9 blocks), Size of downloads: 454 kB
!!! Error: The above package list contains packages which cannot be installed
!!! at the same time on the same system.
For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):