anchor.diff:  { stdenv, fetchurl, xlibs, flex, bison, mesa, alsaLib
   , ncurses, libpng, libjpeg, lcms, freetype, fontconfig, fontforge
  -, libxml2, libxslt, openssl, gnutls, cups
  +, libxml2, libxslt, openssl, gnutls, cups, makeWrapper
   }:
   
   assert stdenv.isLinux;
  
positive.code:     xlibs.libXcursor xlibs.libXinerama xlibs.libXrandr
      xlibs.libXrender xlibs.libXxf86vm xlibs.libXcomposite
      alsaLib ncurses libpng libjpeg lcms fontforge
      libxml2 libxslt openssl gnutls cups
    ];
  
    # Wine locates a lot of libraries dynamically through dlopen().  Add
  
negative.code:   # elements specified above.
    dontPatchELF = true;
  
    postInstall = ''
      install -D ${gecko} $out/share/wine/gecko/${gecko.name}
      wrapProgram $out/bin/wine --prefix LD_LIBRARY_PATH : ${stdenv.gcc.gcc}/lib
    '';
  
    enableParallelBuilding = true;
  
  