Um, what? I have libnettle6 on this Arch Linux system right here (and have, since June 2015). The calibre binary installer works fine, probably because it doesn't depend on nettle in any way.
In the unlikely event that it was somehow needed, calibre already ships all dependent libraries except for glibc >= 2.13 and libstdc++ >= 6.0.17 inside the binary installer, precisely so issues like this cannot happen.
So if you are having problems with the binary installer, please post all relevant error messages. It is by definition meant to work everywhere, so regardless of the issue, Kovid will want to know.
Also, I can guarantee you beyond all shadow of a doubt that you don't have the problem in this thread, because if you look at the Debian bugreport, they fixed it a week later after they discovered the problem was a completely and utterly
empty "calibre-bin" package.
So, an explanation for why you are posting in this old thread would be appreciated.