* Consolidate all dependency information into one place, rather than
having a comment and per-distribution lists.
* Remove packages that are in the GNOME moduleset;
jhbuild sysdeps --install will install these when possible.
* Install 'apt-file' and run 'apt-file update' on Debian-based distributions.
* Actually run sudo rather than prompting the user to run it and exiting;
the exit-and-restart approach doesn't work for 'apt-file update'.
* Run 'jhbuild sysdeps --install'
https://bugzilla.gnome.org/show_bug.cgi?id=668440
d0fd5641c1