nix-channel --add https://nixos.org/channels/nixos-21.11 nixpkgs
nix-channel --add https://github.com/rycee/home-manager/archive/release-21.11.tar.gz home-manager
nix-channel --add https://github.com/t184256/nix-on-droid/archive/testing.tar.gz nix-on-droid
nix-channel --update
nix-on-droid switch