anchor.diff:  
     src = fetchurl {
       url = "https://hubstaff-production.s3.amazonaws.com/downloads/HubstaffClient/Builds/Release/${version}/Hubstaff-${version}.sh";
  -    sha256 = "142q8xvwn5gdmpv5x25py2lindr74jqncf8vvw22yb9nj5aqqsi6";
  +    sha256 = "1dxzyl3yxbfmbw1pv8k3vhqzbmyyf16zkgrhzsbm866nmbgnqk1s";
     };
   
     nativeBuildInputs = [ unzip makeWrapper ];
   
     unpackCmd = ''
       # MojoSetups have a ZIP file at the end. ZIP’s magic string is
  -    # most often PK\x03\x04. This *should* work for future updates,
  +    # most often PK\x03\x04. This has worked for all past updates,
       # but feel free to come up with something more reasonable.
       dataZipOffset=$(grep --max-count=1 --byte-offset --only-matching --text ''$'PK\x03\x04' $curSrc | cut -d: -f1)
       dd bs=$dataZipOffset skip=1 if=$curSrc of=data.zip 2>/dev/null
  
positive.code:   installPhase = ''
      # TODO: handle 32-bit arch?
      rm -r x86
  
      opt=$out/opt/hubstaff
      mkdir -p $out/bin $opt
      cp -r . $opt/
  
      prog=$opt/x86_64/HubstaffClient.bin.x86_64
  
      patchelf --set-interpreter $(cat ${stdenv.cc}/nix-support/dynamic-linker) $prog
      wrapProgram $prog --prefix LD_LIBRARY_PATH : ${rpath}
  
      ln -s $prog $out/bin/HubstaffClient
  
      # Why is this needed? SEGV otherwise.
      ln -s $opt/data/resources $opt/x86_64/resources
  
negative.code: { stdenv, fetchurl, unzip, makeWrapper, libX11, zlib, libSM, libICE
  , libXext , freetype, libXrender, fontconfig, libXft, libXinerama
  , libXfixes, libXScrnSaver, libnotify, glib , gtk3, libappindicator-gtk3
  , curl }:
  
  let
  
    version = "1.3.0-9b2ba62";
  
    rpath = stdenv.lib.makeLibraryPath
      [ libX11 zlib libSM libICE libXext freetype libXrender fontconfig libXft
        libXinerama stdenv.cc.cc.lib libnotify glib gtk3 libappindicator-gtk3
        curl libXfixes libXScrnSaver ];
  
  in
  
  