anchor.diff: -{ fetchurl, lib, mkDerivation, pkg-config, python, file, bc
  +{ fetchurl, lib, mkDerivation, pkg-config, python3, file, bc
   , qtbase, qtsvg, hunspell, makeWrapper #, mythes, boost
   }:
   
  
positive.code:   # LaTeX is used from $PATH, as people often want to have it with extra pkgs
    nativeBuildInputs = [ pkg-config ];
    buildInputs = [
      qtbase qtsvg python file/*for libmagic*/ bc
      hunspell makeWrapper # enchant
    ];
  
  
negative.code: 
    # python is run during runtime to do various tasks
    qtWrapperArgs = [
      " --prefix PATH : ${python3}/bin"
    ];
  
    meta = with lib; {
  