Missing external dependencies:

Xephyr
gconf-2.0

Install the packages from your distribution which provides these
functionalities, including the development package for libraries.
Missing dependencies:

    python 2.5
    rsvg (python module)
    wnck (python module)
    gtk+-2.0 2.10
    pygtk-2.0 2.10
    xulrunner/firefox 1.8/1.9