localhost ~ # USE="python modplug gaim ffmpeg" emerge -av bmpx

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

Calculating dependencies... done!
[ebuild     U ] media-sound/bmpx-0.34.9 [0.32.0-r1] USE="aac alsa ffmpeg* flac mad modplug%* nls ogg oss python%* vorbis -cdparanoia -debug -hal -musepack -ofa -p2p -sid -theora (-gaim%) (-raptor%)" 0 kB 

Total size of downloads: 0 kB

Would you like to merge these packages? [Yes/No] y

>>> Emerging (1 of 1) media-sound/bmpx-0.34.9 to /
 * bmpx-0.34.9.tar.bz2 MD5 ;-) ...                                        [ ok ]
 * bmpx-0.34.9.tar.bz2 RMD160 ;-) ...                                     [ ok ]
 * bmpx-0.34.9.tar.bz2 SHA1 ;-) ...                                       [ ok ]
 * bmpx-0.34.9.tar.bz2 SHA256 ;-) ...                                     [ ok ]
 * bmpx-0.34.9.tar.bz2 size ;-) ...                                       [ ok ]

....later....

checking for DBUS... configure: error: Package requirements (dbus-1 >= 0.61 dbus-glib-1 >= 0.61) were not met.
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively you may set the DBUS_CFLAGS and DBUS_LIBS environment variables
to avoid the need to call pkg-config.  See the pkg-config man page for
more details.

!!! Please attach the following file when filing a report to bugs.gentoo.org:
!!! /var/tmp/portage/bmpx-0.34.9/work/bmpx-0.34.9/config.log

!!! ERROR: media-sound/bmpx-0.34.9 failed.
Call stack:
  ebuild.sh, line 1546:   Called dyn_compile
  ebuild.sh, line 937:   Called src_compile
  bmpx-0.34.9.ebuild, line 67:   Called econf '--enable-python' '--enable-modplug' '--enable-mp4v2' '--disable-moodriver' '--disable-hal' '--enable-nls' '--disable-ofa' '--disable-sid' '--disable-debug'
  ebuild.sh, line 540:   Called die

!!! econf failed
!!! If you need support, post the topmost build error, and the call stack if relevant.

localhost ~ # eix dbus-glib
* dev-libs/dbus-glib 
     Available versions:  0.72
     Installed:           0.71
     Homepage:            http://dbus.freedesktop.org/
     Description:         D-Bus bindings for glib


Found 1 matches
localhost ~ # eix dbus
* dev-libs/dbus-glib 
     Available versions:  0.72
     Installed:           0.71
     Homepage:            http://dbus.freedesktop.org/
     Description:         D-Bus bindings for glib

* dev-libs/dbus-qt3-old 
     Available versions:  0.70
     Installed:           0.70
     Homepage:            http://freedesktop.org/wiki/Software_2fdbus
     Description:         D-BUS Qt3 bindings compatible with old application API and new dbus