anchor.diff:  , pkgconfig, libtool
   , gtk, mesa, readline, libX11, libXpm
   , docbook_xml_dtd_45, docbook_xsl
  -, sdlSupport ? true, SDL ? null
  +, sdlSupport ? true, SDL2 ? null
   , termSupport ? true , ncurses ? null
   , wxSupport ? false, wxGTK ? null # Warning! Broken
   # Optional, undocumented dependencies
  
positive.code:     "--enable-raw-serial=no" ]
      # Boolean flags
      ++ stdenv.lib.optional termSupport "--with-term"
      ++ stdenv.lib.optional sdlSupport "--with-sdl"
      ++ stdenv.lib.optional wxSupport "--with-wx"
      ++ stdenv.lib.optional largefile "--enable-largefile"
      ++ stdenv.lib.optional idleHack "--enable-idle-hack"
  
negative.code: stdenv.mkDerivation rec {
  
    name = "bochs-${version}";
    version = "2.6.7";
  
    src = fetchurl {
      url = "http://downloads.sourceforge.net/project/bochs/bochs/${version}/${name}.tar.gz";
      sha256 = "10l2pgzwnmng0rd44kqv7y46nwpcc18j53h3kf3dlqlnd7mlwdd4";
    };
  
    # The huge list of configurable options
  