anchor.diff:  , samba ? null, sambaSupport ? true
   , libmicrohttpd
   # TODO: would be nice to have nfsSupport (needs libnfs library)
  -# TODO: librtmp
  +, rtmpdump ? null, rtmpSupport ? true
   , libvdpau ? null, vdpauSupport ? true
   , pulseaudio ? null, pulseSupport ? true
   , libcec ? null, cecSupport ? true
  
positive.code:     ]
      ++ lib.optional (! sambaSupport) "--disable-samba"
      ++ lib.optional vdpauSupport "--enable-vdpau"
      ++ lib.optional pulseSupport "--enable-pulse";
  
      postInstall = ''
        for p in $(ls $out/bin/) ; do
  
negative.code:           --prefix LD_LIBRARY_PATH ":" "${systemd}/lib" \
            --prefix LD_LIBRARY_PATH ":" "${libmad}/lib" \
            --prefix LD_LIBRARY_PATH ":" "${libvdpau}/lib" \
            --prefix LD_LIBRARY_PATH ":" "${libcec}/lib" \
            --prefix LD_LIBRARY_PATH ":" "${rtmpdump}/lib"
        done
      '';
  
  