It looks to me like one of the dependencies of xsltproc is conflicting with your top harmattan metapackage. It might be something that the repo maintainers can help with. Have a look at apt-cache show mp-harmattan-<whatever that said>. Mine different, because my phone's from a different region.
Zoxir - that package needs ./configure then make then make install. It was only papyon that had the special build script. Each one is different, need to look at each README throughly.

The best solution would be if these packages were turned into proper debs and put in a repository, but that requires tools and accounts that I don't have (and probably an n950 )