anchor.diff:  , xorg
   , makeWrapper
   , pkgconfig
  -, vlc
  +, libvlc
   , mbedtls
   
   , scriptingSupport ? true
  
positive.code: 
    postInstall = ''
        wrapProgram $out/bin/obs \
          --prefix "LD_LIBRARY_PATH" : "${xorg.libX11.out}/lib:${vlc}/lib"
    '';
  
    postFixup = stdenv.lib.optionalString stdenv.isLinux ''
  
negative.code:     qtsvg
      speex
      x264
      libvlc
      makeWrapper
      mbedtls
    ]
  