anchor.diff:  
     installTargets = [ "install_client" "install_man" ];
   
  -  qtWrapperArgs = [ "--suffix PATH : ${nx-libs}/bin:${openssh}/libexec" ];
  +  qtWrapperArgs = [ "--suffix PATH : ${nx-libs}/bin:${openssh}/libexec" "--set QT_QPA_PLATFORM xcb" ];
   
     meta = with lib; {
       description = "Graphical NoMachine NX3 remote desktop client";
  
positive.code:     sha256 = "yZUyZ8QPpnEZrZanO6yx8mYZbaIFnwzc0bjVGZQh0So=";
    };
  
    buildInputs = [ cups libssh libXpm nx-libs openldap openssh
                    qtbase qtsvg qtx11extras qttools phonon pkg-config ];
  
    postPatch = ''
       substituteInPlace src/onmainwindow.cpp --replace "/usr/sbin/sshd" "${openssh}/bin/sshd"
  
negative.code: { lib
  , fetchurl
  , cups
  , libssh
  , libXpm
  , nx-libs
  , openldap
  , openssh
  , qt5
  , qtbase
  , qtsvg
  , qtx11extras
  , qttools
  , phonon
  , pkg-config
  }:
  
  qt5.mkDerivation rec {
    pname = "x2goclient";
    version = "4.1.2.2";
  
  