anchor.diff: -{ mkDerivation, stdenv, lib, qtbase, qtsvg, libglvnd, fetchurl, makeDesktopItem }:
  +{ 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
  
positive.code:       qtbase            # libQt5PrintSupport.so.5
        qtsvg             # libQt5Svg.so.5
        stdenv.cc.cc.lib  # libstdc++.so.6
        libglvnd          # ibGL.so.1
      ];
    in ''
      patchelf \
  
negative.code: 
    src = fetchurl {
      url = "http://www.styluslabs.com/write/write${version}.tar.gz";
      sha256 = "1kg4qqxgg7iyxl13hkbl3j27dykra56dj67hbv0392mwdcgavihq";
    };
  
    sourceRoot = ".";
  