TeX Live manual installation

Gentoo provides packages for TeX Live in the official tree, but there are  very difficult to update. The TeX Live packages in the tree are several months (sometimes a year) behind upstream, while users who install TeX Live manually with the tlmgr manager get updates every day.

This page collects user experience and hints about the manual installation

Manual installation
Get the latest installer from https://www.tug.org/texlive/ and follow the instructions to install to /usr/local.

Dependencies
The manual TeX Live installation provides many packages, which could be installed via portage too. To prevent portage to install app-text/texlive as dependency, one can add the package names in a .provided file:

/etc/portage/profile/package.provided/texlive.provided app-text/texlive-2016 app-text/texlive-core-2016-r2 dev-texlive/texlive-basic-2016 dev-tex/revtex-4.1_p2-r1 dev-tex/tex4ht-20090611_p1038-r4 dev-tex/latexdiff-1.2.0 dev-texlive/texlive-fontsextra-2016 dev-texlive/texlive-fontsrecommended-2016 dev-texlive/texlive-fontutils-2016