anchor.diff:  
     # python is run during runtime to do various tasks
     qtWrapperArgs = [
  -    " --prefix PATH : ${python}/bin"
  +    " --prefix PATH : ${python3}/bin"
     ];
   
     meta = with lib; {
  
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: { fetchurl, lib, mkDerivation, pkg-config, python3, file, bc
  , qtbase, qtsvg, hunspell, makeWrapper #, mythes, boost
  }:
  
  