Reproducible 

Copying NixOS from Chromebook 1 to Chromebook 2 with the help of GPT 5.6 Sol medium only took 10 minutes using a USB drive.

Important: I left an AGENTS.md file that allows NixOS to install the flake in the nixos-config directory.

Important CLI

$ sudo nixos-install —root /mnt  —flake /mnt/etc/nixos-config#acer-c720p-4gb —no-root-passwd —option experimental-features 'nix-command flakes' —option max-jobs 1 —option cores 1

$ sudo nixos-enter --root /mnt -c 'passwd nico'