nixos_setup.sh

sed -e 's/\s*\([\+0-9a-zA-Z]*\).*/\1/' << EOF | gdisk /dev/sda
  n       # new partition
  1       # partition number 1
  2048    # first sector
  4095    # end sector
  ef02    # BIOS boot partition
  n       # new partition
  2       # partition number 2
  4096    # first sector
  1028095 # end sector
  8300    # Linux filesystem
  n       # new partition
  3       # partition number 3
  1028096 # first sector
  3125247 # end sector
  8200    # Linux swap
  n       # new partition
  4       # partition number 4
  3125248 # first sector
          # default, use the rest of the disk for our root partition
  8300    # linux filesystem
  v       # verify
  w       # write
  Y       # confirm write
EOF

mkfs.ext4 -L nixos /dev/sda4
mkfs.ext4 -L boot /dev/sda2
mkswap -L swap /dev/sda3

mount /dev/sda4 /mnt
mkdir /mnt/boot
mount /dev/sda2 /mnt/boot
swapon /dev/sda3

adduser --disabled-password --gecos "" nix
groupadd -r nixbld
for n in $(seq 1 10); do useradd -c "Nix build user $n" \
    -d /var/empty -g nixbld -G nixbld -M -N -r -s "$(which nologin)" \
    nixbld$n; done

update-ca-certificates
mkdir /nix
chown -R nix /nix
su - nix << HERE
bash <(curl https://nixos.org/nix/install)
HERE

. ~nix/.nix-profile/etc/profile.d/nix.sh
nix-channel --remove nixpkgs
nix-channel --add http://nixos.org/channels/nixos-15.09 nixos
nix-channel --update

cat <<EOF > /root/configuration.nix
{ fileSystems."/" = {};
  boot.loader.grub.enable = false;
}
EOF
export NIX_PATH=nixpkgs=/root/.nix-defexpr/channels/nixos:nixos=/root/.nix-defexpr/channels/nixos/nixos
export NIXOS_CONFIG=/root/configuration.nix
nix-env -i -A config.system.build.nixos-install \
           -A config.system.build.nixos-option \
           -A config.system.build.nixos-generate-config \
           -f "<nixos>"

# Configure NixOS

export NIX_PATH=nixpkgs=/root/.nix-defexpr/channels/nixos:nixos=/root/.nix-defexpr/channels/nixos/nixos
nixos-generate-config --root /mnt

OLD_IMPORT_LINE="  imports \= \[ \]\;"
NEW_IMPORT_LINE="  imports = [ <nixpkgs\/nixos\/modules\/profiles\/qemu-guest.nix> ];"
sed -i "s#$OLD_IMPORT_LINE#$NEW_IMPORT_LINE#g" /mnt/etc/nixos/hardware-configuration.nix
unset OLD_IMPORT_LINE
unset NEW_IMPORT_LINE

cat <<EOF > /mnt/etc/nixos/configuration.nix
# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running 'nixos-help').

{ config, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  boot.initrd.availableKernelModules = [ "virtio_net" "virtio_pci" "virtio_blk" "virtio_scsi" "9p" "9pnet_virtio" "ata_piix" "virtio_pci" ];
  boot.kernelModules = [ ];
  boot.extraModulePackages = [ ];
  boot.kernelParams = [ "console=ttyS0" ];
  boot.loader.grub.extraConfig = "serial; terminal_input serial; terminal_output serial";

  # Use the GRUB 2 boot loader.
  boot.loader.grub.enable = true;
  boot.loader.grub.version = 2;
  # Define on which hard drive you want to install Grub.
  boot.loader.grub.device = "/dev/sda";

  # networking.hostName = "nixos"; # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # Select internationalisation properties.
  # i18n = {
  #   consoleFont = "Lat2-Terminus16";
  #   consoleKeyMap = "us";
  #   defaultLocale = "en_US.UTF-8";
  # };

  # Set your time zone.
  # time.timeZone = "Europe/Amsterdam";

  # List packages installed in system profile. To search by name, run:
  # $ nix-env -qaP | grep wget
  # environment.systemPackages = with pkgs; [
  #   wget
  # ];

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  services.openssh.enable = true;

  # Enable CUPS to print documents.
  # services.printing.enable = true;

  # Enable the X11 windowing system.
  # services.xserver.enable = true;
  # services.xserver.layout = "us";
  # services.xserver.xkbOptions = "eurosign:e";

  # Enable the KDE Desktop Environment.
  # services.xserver.displayManager.kdm.enable = true;
  # services.xserver.desktopManager.kde4.enable = true;

  # The NixOS release to be compatible with for stateful data such as databases.
  system.stateVersion = "15.09";

}
EOF

#systemctl status dev-sda3.swap
unset NIXOS_CONFIG
nixos-install

echo "!!! Set a root-password for your NixOS installation"
echo "!!! Use the tool \`passwd\` to set the password"
nixos-install --chroot