./start.sh attempts to automate the usual setup steps for a fresh desktop install.
It mostly works between Debian and Manjaro (which I keep jumping between).
Neovim is now built from source with the alternate path prefix assumed
to be $HOME/neovim:
Check https://github.com/neovim/neovim/wiki/Installing-Neovim#install-from-source for up-to-date build instructions