./sugar-jhbuild build
Checking dependencies...
Missing external dependencies:

Xephyr
fribidi
enchant

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

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

Install the packages from your distribution which provides these
functionalities, including the development package for libraries.
If one or more of the packages (and versions) are not provided by your
distribution you can build them from sources, using this command:
    sugar-jhbuild build-base