anchor.diff:  , kio, kcrash
   , boost, libraw, fftw, eigen, exiv2, libheif, lcms2, gsl, openexr, giflib
   , openjpeg, opencolorio, vc, poppler, curl, ilmbase
  -, qtmultimedia, qtx11extras
  +, qtmultimedia, qtx11extras, quazip
   , python3Packages
   }:
   
   let
   
  -major = "4.1";
  -minor = "8";
  +major = "4.2";
  +minor = "0";
   patch = null;
   
   in
  
positive.code: 
    src = fetchurl {
      url = "https://download.kde.org/stable/krita/${major}.${minor}/${name}.tar.gz";
      sha256 = "0h2rplc76r82b8smk61zci1ijj9xkjmf20pdqa8fc2lz4zicjxh4";
    };
  
    nativeBuildInputs = [ cmake extra-cmake-modules python3Packages.sip makeWrapper ];
  
negative.code:     ki18n kitemmodels kitemviews kwindowsystem kio kcrash
      boost libraw fftw eigen exiv2 lcms2 gsl openexr libheif giflib
      openjpeg opencolorio poppler curl ilmbase
      qtmultimedia qtx11extras quazip
      python3Packages.pyqt5
    ] ++ lib.optional (stdenv.hostPlatform.isi686 || stdenv.hostPlatform.isx86_64) vc;
  
  