All sources hosted at tango.freedesktop.org became inaccessible  a
couple of days ago, probably due to some software upgrade on
I contacted upstream yesterday and was told that tango-icon-theme,
tango-icon-theme-extras and icon-naming-utils are dead and that we
shouldn't rely on upstream sources being available (they even mentioned
they probably won't care about the 404). It has been suggested to use
gnome-icon-theme and gnome-icon-theme-extras instead.
Given that xfce4-settings seems to be the only package depending on
tango-icon-theme, I'd suggest to:
* Remove the "tango-icon-theme" dependency from xfce4-settings (this
shouldn't break anything, does it?)
* Move both tango-icon-theme and tango-icon-theme-extras to
* Think about what to do with icon-naming-utils. We seem to need those
for gnome-icon-theme and gnome-icon-theme-symbolic, so putting the
source tarball on our source mirror might be the best thing to do
(unless there's a proper alternative, of course).