{
  lib,
  stdenv,
  fetchurl,
  unzip,
}: let
  version = "1.6.3";
  srcs = {
    x86_64-linux = fetchurl {
      url = "https://github.com/jstarks/npiperelay/releases/download/v0.1.0/npiperelay_windows_amd64.zip";
      sha256 = "sha256-a572H/0XwDUHqaPVTYFdzrPa5mmsZ/w79CJdHnZM5fY=";
    };

    # aarch64-linux = fetchurl {
    #   url =
    #     "https://deconz.dresden-elektronik.de/debian/stable/deconz_${version}-debian-buster-stable_arm64.deb";
    #   sha256 = "sha256-zuy4e9bzcRqDeXP6mfzZLCDK/3we25LH6xktnO6HXps=";
    # };
  };
in
  stdenv.mkDerivation rec {
    pname = "npiperelay";
    inherit version;

    src = srcs.${stdenv.hostPlatform.system};

    nativeBuildInputs = [unzip];

    #buildInputs = [ qtserialport qtwebsockets ];
    unpackPhase = ''
      mkdir npiperelay-$version
      cd npiperelay-$version
      unzip $src
    '';
    #unpackPhase = "dpkg-deb -x $src .";

    installPhase = ''
      mkdir -p $out/bin
      cp npiperelay.exe $out/bin/npiperelay.exe
      chmod +x $out/bin/npiperelay.exe
    '';

    meta = with lib; {
      description = "Helper to interface with Windows ssh-agent.exe service from Windows Subsystem for Linux (WSL)";
      # 2019-08-19: The homepage links to old software that doesn't even work --
      # it fails to detect ConBee2.
      homepage = "https://github.com/rupor-github/wsl-ssh-agent";
      license = licenses.free;
      platforms = ["x86_64-linux"];
      maintainers = with maintainers; [sstent];
    };
  }