20240809194235-nix changing nix conf

To change /etc/nix/nix.conf, a new section in /etc/nixos/configuration.nix is needed:

nix.extraOptions = ''download-speed = 800'';

nixos manages /etc/nix/nix.conf , which is a symlink to the nix stprage

• https://unix.stackexchange.com/questions/544340/nixos-unable-to-modify-or-chmod-nix-config-etc-nix-nix-conf
• https://nix.dev/manual/nix/2.23/command-ref/conf-file.html[#conf](/a/tag/conf/)-download-speed