anchor.diff:      mkdir -p $out/bin
       cp -r * $out/bin
   
  -    makeWrapper "${mono46}/bin/mono" $out/bin/MediaBrowser.Server.Mono \
  +    makeWrapper "${mono54}/bin/mono" $out/bin/MediaBrowser.Server.Mono \
         --add-flags "$out/bin/MediaBrowser.Server.Mono.exe -ffmpeg ${ffmpeg}/bin/ffmpeg -ffprobe ${ffmpeg}/bin/ffprobe"
     '';
   
  
positive.code: { stdenv, fetchurl, pkgs, unzip, sqlite, makeWrapper, mono46, ffmpeg, ... }:
  
  stdenv.mkDerivation rec {
    name = "emby-${version}";
  
negative.code:     makeWrapper
    ];
    propagatedBuildInputs = with pkgs; [
      mono54
      sqlite
    ];
  
  