# install nix
sh <(curl -L https://nixos.org/nix/install) --daemon
. $HOME/.nix-profile/etc/profile.d/nix.sh
nix-channel --add https://nixos.org/channels/nixos-20.09 nixpkgs
nix-channel --update

# install nixos-generate-config and nixos-install
nix-env -iE "_: with import <nixpkgs/nixos> { configuration = {}; }; with config.system.build; [ nixos-generate-config nixos-install ]"

# generate config
sudo `which nixos-generate-config` --root /mnt

# leave only required mounts
sudo nano /mnt/etc/nixos/hardware-configuration.nix
# set hostname, add users and ssh-keys, enable openssh
sudo nano /mnt/etc/nixos/configuration.nix

sudo `which nixos-install`