anchor.diff:        qtbase            # libQt5PrintSupport.so.5
         qtsvg             # libQt5Svg.so.5
         stdenv.cc.cc.lib  # libstdc++.so.6
  -      libglvnd          # ibGL.so.1
  +      libglvnd          # libGL.so.1
  +      libX11            # libX11.so.6
  +      libXi             # libXi.so.6
       ];
     in ''
       patchelf \
  
positive.code: in
  mkDerivation rec {
    pname = "write_stylus";
    version = "209";
  
    desktopItem = makeDesktopItem {
      name = "Write";
  
negative.code: { mkDerivation, stdenv, lib, qtbase, qtsvg, libglvnd, libX11, libXi, fetchurl, makeDesktopItem }:
  let
    # taken from: https://www.iconfinder.com/icons/50835/edit_pencil_write_icon
    # license: Free for commercial use
  