{
  lib,
  stdenvNoCC,
  namespace,
  pkgs,
}:
let
  inherit (lib.trivial) importJSON;
  inherit (lib.${namespace}) selectVariant mkAllSources;

  versionSpec = importJSON ./version.json;
  selected = selectVariant versionSpec null null;
  vars = selected.variables or { };
  sources = mkAllSources pkgs selected;
in
stdenvNoCC.mkDerivation rec {
  inherit (vars) version;
  pname = "uefi-rpi4";

  src = sources.firmware;

  sourceRoot = ".";

  dontBuild = true;
  # Firmware blobs do not need fixing and should not be modified
  dontFixup = true;

  installPhase = ''
    runHook preInstall
    mkdir -p "$out"

    cp -rv "${src}/." "$out"
    # cp -rv "${src}/RPI_EFI.fd" "$out"
    # cp -rv "${src}/config.txt" "$out"

    runHook postInstall
  '';

  meta = with lib; {
    description = "RPI4 UEFI firmware";
    homepage = "https://github.com/pftf/RPi4";
    platforms = platforms.linux;
    maintainers = [ ];
  };
}