anchor.diff:  { stdenv, lib, fetchFromGitHub, cmake, pkgconfig
   , alsaLib, ffmpeg, glib, openssl, pcre, zlib
  -, libX11, libXcursor, libXdamage, libXext, libXi, libXinerama, libXrandr, libXrender, libXv
  +, libX11, libXcursor, libXdamage, libXext, libXi, libXinerama, libXrandr, libXrender, libXv, libXtst
   , libxkbcommon, libxkbfile
   , wayland
   , gstreamer, gst-plugins-base, gst-plugins-good, libunwind, orc
  +, libxslt
  +, libusb1
   , libpulseaudio ? null
   , cups ? null
   , pcsclite ? null
  
positive.code:     '';
      homepage = "http://www.freerdp.com/";
      license = licenses.asl20;
      maintainers = with maintainers; [ peterhoeg ];
      platforms = platforms.unix;
    };
  }
  
negative.code:   buildInputs = with lib; [
      alsaLib cups ffmpeg glib openssl pcre pcsclite libpulseaudio zlib
      gstreamer gst-plugins-base gst-plugins-good libunwind orc
      libX11 libXcursor libXdamage libXext libXi libXinerama libXrandr libXrender libXv libXtst
      libxkbcommon libxkbfile
      wayland libusb1
      libxslt
    ] ++ optional stdenv.isLinux systemd;
  
    nativeBuildInputs = [
  