anchor.diff:  { stdenv
   , fetchurl
  +, autoreconfHook
   , dbus
   , gettext
   , gnutls
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "filezilla";
    version = "3.49.1";
  
    src = fetchurl {
      url = "https://download.filezilla-project.org/client/FileZilla_${version}_src.tar.bz2";
      sha256 = "1dmkwpc0vy7058bh9a10ida0k64rxggap8ysl5xx3457y468rk2f";
    };
  
    # https://www.linuxquestions.org/questions/slackware-14/trouble-building-filezilla-3-47-2-1-current-4175671182/#post6099769
  
negative.code:     "--disable-autoupdatecheck"
    ];
  
    nativeBuildInputs = [ autoreconfHook pkgconfig ];
  
    buildInputs = [
      dbus
  