no idea.
i have debian testing and i can compile scribus without any issues...
(well, except OSG... afaik, it should not be installed or you shulld tell cmake to ignore it: -DWANT_NOOSG=1)
the appimage also used to work here, but i have not tried for some time...
let me try it...
---> indeed it does not work here...
afaik, mattia is taking care of the debian package and he then only pushes the same packages into ubuntu.
but yes, he is mainly an ubuntu guy, afaik.
i don't know what libxcb but from what i could understand from a quick internet + apt search it does not relate to scribus.
i don't know which instructions you are folllowing, but if you can come in irc we can try to sort out the issues for compiling...
i'm mostly around at daytime CET.