anchor.diff:        if stdenv.hostPlatform.system == "x86_64-linux" then
           fetchurl {
             url = "https://download.nomachine.com/download/${versionMajor}/Linux/nomachine_${version}_${versionBuild_x86_64}_x86_64.tar.gz";
  -          sha256 = "1qir9ii0h5ali87mjzjl72dm1ky626d7y59jfpglakqxzqhjamdz";
  +          sha256 = "1kkdf9dlp4j453blnwp1sds4r3h3fy863pvhdh466mrq3f10qca8";
           }
         else if stdenv.hostPlatform.system == "i686-linux" then
           fetchurl {
             url = "https://download.nomachine.com/download/${versionMajor}/Linux/nomachine_${version}_${versionBuild_i686}_i686.tar.gz";
  -          sha256 = "1gxiysc09k3jz1pkkyfqgw2fygcnmrnskk6b9vn4fjnvsab4py60";
  +          sha256 = "0h4c90hzhbg0qdb585bc9gry9cf9hd8r53m2jha4fdqhzd95ydln";
           }
         else
           throw "NoMachine client is not supported on ${stdenv.hostPlatform.system}";
  
positive.code: { lib, stdenv, file, fetchurl, makeWrapper,
    autoPatchelfHook, jsoncpp, libpulseaudio }:
  let
    versionMajor = "7.4";
    versionMinor = "1";
    versionBuild_x86_64 = "1";
    versionBuild_i686 = "1";
  in
    stdenv.mkDerivation rec {
  
negative.code:       platforms = [ "x86_64-linux" "i686-linux" ];
      };
    }
  