My NixOS Configuration.
sudo nix-channel --add https://nixos.org/channels/nixos-unstable nixos
sudo cp system/configuration.nix /etc/nixos/configuration.nix
sudo cp system/machines/totoro.nix /etc/nixos/system.nix
sudo nixos-rebuild switch --upgrade
mkdir -p $HOME/.config/nixpkgs/
cp -r home/* $HOME/.config/nixpkgs/
nix-channel --add https://github.com/rycee/home-manager/archive/master.tar.gz home-manager
nix-channel --update
export NIX_PATH=$HOME/.nix-defexpr/channels${NIX_PATH:+:}$NIX_PATH
nix-shell '<home-manager>' -A install
home-manager switch