kde-misc/plasma-mpd-nowplaying-0.2 will not compile without media-libs/libmpdclient-2.6 installed. The ebuild should depend on libmpdclient.
I don't know about the version, but it should probably (R)DEPEND on media-libs/libmpdclient to begin with. :)
(In reply to comment #1) > I don't know about the version, but it should probably (R)DEPEND on > media-libs/libmpdclient to begin with. :) True... and 2.4 is fine too. :) Fixed, thanks everyone.