anchor.diff:  { stdenv, lib, fetchurl, makeWrapper
  -, pkgconfig, cmake, gnumake, yasm, python
  +, pkgconfig, cmake, gnumake, yasm, python2
   , boost, avahi, libdvdcss, lame, autoreconfHook
   , gettext, pcre-cpp, yajl, fribidi, which
   , openssl, gperf, tinyxml2, taglib, libssh, swig, jre
  
positive.code:     postInstall = ''
        for p in $(ls $out/bin/) ; do
          wrapProgram $out/bin/$p \
            --prefix PATH ":" "${python}/bin" \
            --prefix PATH ":" "${glxinfo}/bin" \
            --prefix PATH ":" "${xdpyinfo}/bin" \
            --prefix LD_LIBRARY_PATH ":" "${lib.makeLibraryPath
  
negative.code: 
      buildInputs = [
        makeWrapper libxml2 gnutls
        pkgconfig cmake gnumake yasm python2
        boost libmicrohttpd autoreconfHook
        gettext pcre-cpp yajl fribidi libva
        openssl gperf tinyxml2 taglib libssh swig jre
  