anchor.diff:            --prefix LD_LIBRARY_PATH ":" "${libmad}/lib" \
             --prefix LD_LIBRARY_PATH ":" "${libvdpau}/lib" \
             --prefix LD_LIBRARY_PATH ":" "${libcec}/lib" \
  +          --prefix LD_LIBRARY_PATH ":" "${libcec_platform}/lib" \
             --prefix LD_LIBRARY_PATH ":" "${rtmpdump}/lib"
         done
       '';
  
positive.code: , rtmpdump ? null, rtmpSupport ? true
  , libvdpau ? null, vdpauSupport ? true
  , libpulseaudio ? null, pulseSupport ? true
  , libcec ? null, cecSupport ? true
  }:
  
  assert dbusSupport  -> dbus_libs != null;
  
negative.code:       ./bootstrap
      '';
  
      configureFlags = [ ]
      ++ lib.optional (!sambaSupport) "--disable-samba"
      ++ lib.optional vdpauSupport "--enable-vdpau"
      ++ lib.optional pulseSupport "--enable-pulse"
  