{
  device_config
  , hardware_config
  , initrd
  , pkgs
}:
with pkgs;
let
  inherit (hardware_config) ram;
  device_name = device_config.name;
  device_info = device_config.info;
  linux = device_info.kernel;
  kernel = "${linux}/*Image*";

  # TODO : Allow appending / prepending
  cmdline = device_info.kernel_cmdline;
in
stdenv.mkDerivation {
  name = "nixos-mobile_${device_name}_boot.img";

  src = builtins.filterSource (path: type: false) ./.;
  unpackPhase = "true";

  buildInputs = [
    linux
  ];

  installPhase = ''
      mkdir -p $out/
      cp ${kernel} $out/kernel
      cp ${initrd} $out/initrd
      echo -n "${cmdline}" > $out/cmdline.txt
      echo -n "${toString ram}" > $out/ram.txt
  '';
}