anchor.diff:  
   stdenv.mkDerivation rec {
     name = "freerdp-${version}";
  -  version = "2.0.0-rc1";
  +  version = "2.0.0-rc2";
   
     src = fetchFromGitHub {
       owner  = "FreeRDP";
       repo   = "FreeRDP";
       rev    = version;
  -    sha256 = "0m28n3mq3ax0j6j3ai4pnlx3shg2ap0md0bxlqkhfv6civ9r11nn";
  +    sha256 = "01cm9g4xqihnnc5d2w1zs8gabkv59p7fyjwi1cwpzv6s198xwbfs";
     };
   
     # outputs = [ "bin" "out" "dev" ];
  
positive.code:   '';
  
    buildInputs = with lib; [
      alsaLib cups ffmpeg_2 glib openssl pcre pcsclite libpulseaudio zlib
      gstreamer gst-plugins-base gst-plugins-good
      libX11 libXcursor libXdamage libXext libXi libXinerama libXrandr libXrender libXv
      libxkbcommon libxkbfile
      wayland
  
negative.code: { stdenv, lib, fetchFromGitHub, cmake, pkgconfig
  , alsaLib, ffmpeg, glib, openssl, pcre, zlib
  , libX11, libXcursor, libXdamage, libXext, libXi, libXinerama, libXrandr, libXrender, libXv
  , libxkbcommon, libxkbfile
  , wayland
  , gstreamer, gst-plugins-base, gst-plugins-good, libunwind, orc
  , libpulseaudio ? null
  , cups ? null
  , pcsclite ? null
  