https://ops.functionalalgebra.com/nix-by-example/

2024
Vimjoyer - Top 6 Best NixOS Tips & Tricks of 13:33
    https://www.youtube.com/watch?v=cH9HGs2AxuA
    ! nix-env -iA <pkg> - install package globally
    ! nix-shell -p nodejs nodePackages.typsecript-language-server typescript --command pwsh
    ! {pkgs, lib, ...}: {
      system.activationScripts = {
        myCustomConfigFile = ''
          mkdir -p /home/<usr>/.config/hypr
          cat << EOF > /home/<usr>/.config/hypr/hyprland.conf
          general {
            ...
          }
        '';
      };
    }
Chris McDonough - NixOS 75: Nix Tips and Tricks 0:00 of 13:27
    https://www.youtube.com/watch?v=hrBxHmuzEBo
    https://github.com/mcdonc/.nixconfig/blob/master/videos/tipsntricks/script.rst