anchor.diff:  
     src = fetchurl {
       url = "http://www.styluslabs.com/write/write${version}.tar.gz";
  -    sha256 = "1p6glp4vdpwl8hmhypayc4cvs3j9jfmjfhhrgqm2xkgl5bfbv2qd";
  +    sha256 = "1kg4qqxgg7iyxl13hkbl3j27dykra56dj67hbv0392mwdcgavihq";
     };
   
     sourceRoot = ".";
  
positive.code: in
  mkDerivation rec {
    pname = "write_stylus";
    version = "209";
  
    desktopItem = makeDesktopItem {
      name = "Write";
  
negative.code:       qtbase            # libQt5PrintSupport.so.5
        qtsvg             # libQt5Svg.so.5
        stdenv.cc.cc.lib  # libstdc++.so.6
        libglvnd          # libGL.so.1
        libX11            # libX11.so.6
        libXi             # libXi.so.6
      ];
    in ''
      patchelf \
  