https://nixos.org/manual/nix/stable/#sec-nix-shell
https://nixos.wiki/wiki/Development_environment_with_nix-shell
https://nixos.org/guides/nix-pills/developing-with-nix-shell.html

zsh and fish support
https://github.com/haslersn/any-nix-shell

2024
Vimjoyer - Best Way To Manage Project Dependencies | Nix Shells 2:00 of 10:44
    https://www.youtube.com/watch?v=0YBWhSNTgV8
2023
Tweag - The Nix Hour #11 [nix-shell, mkShell, shell.nix, flakes] 0:00 of 57:31
    https://www.youtube.com/watch?v=_8DS6IqqrBA
2020
https://ghedam.at/15978/an-introduction-to-nix-shell
    !!!

nix-shell
    [shell.nix]

    -p|--packages <pkg>
        try pkg in a shell without installing

    --run <cmd>
        run cmd
2019
https://trskop.github.io/articles/2019-12-05-nix-shell-shebang.html