anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "upwork";
  -  version = "5.4.9.6";
  +  version = "5.5.0.1";
   
     src = fetchurl {
  -    url = "https://upwork-usw2-desktopapp.upwork.com/binaries/v5_4_9_6_2565cdd0547940a2/${pname}_${version}_amd64.deb";
  -    sha256 = "ff6246b3b4a1ed79cc9bca2934652fefb40bdac4b7e95997f3a46e354ce52456";
  +    url = "https://upwork-usw2-desktopapp.upwork.com/binaries/v5_5_0_1_291c031686ed44ff/${pname}_${version}_amd64.deb";
  +    sha256 = "49192ecfb10929b5b51cf8899186059649c894109ec172695cd7cfaa50923f6a";
     };
   
     dontWrapGApps = true;
  
positive.code:       $out/bin/upwork \
        --prefix XDG_DATA_DIRS : "${gtk3}/share/gsettings-schemas/${gtk3.name}/" \
        --prefix LD_LIBRARY_PATH : ${libPath}
    '';
  
    meta = with lib; {
  
negative.code:   '';
  
    installPhase = ''
      runHook preInstall
      mv usr $out
      mv opt $out
      sed -e "s|/opt/Upwork|$out/bin|g" -i $out/share/applications/upwork.desktop
  