Remove stale DBUS_SLAVE cruf.
Break out CPPFLAGS from CONFIGURE_ENV.
Add additional x11 depends [1]
Specify full path to dbus-uuidgen. So it can be run on new installs, before ${LOCALBASE}/bin is added to PATH. [2]
Submitted by: John Prather <john.c.prather@gmail.com> [1]
Michal Varga <varga.michal@gmail.com> [2]