[tex-live] Getting TeX Live installed in /usr/local to see an .sty installed in /usr/share

[Дарио Ѓорѓевски]

I installed TeX Live using the network install in /usr/local (as it is by default).

The value of TEXMFHOME is ~/texmf and of TEXMFLOCAL is /usr/local/texlive/texmf-local. However, my Linux distribution's package manager installed sagetex.sty in /usr/share/texmf and its documentation in /usr/share/doc. What is the best way to get TeX Live to see those two, without copying anything over? I read that modifying TEXMFLOCAL to include multiple trees is not encouraged (and even if it included /usr/share/texmf, texdoc still wouldn't find the documentation in /usr/share/doc). So, is there any alternative?

Thanks.