anchor.diff: -{ stdenv, fetchurl, python, zip, pandoc }:
  +{ stdenv, fetchurl, makeWrapper, python, zip, pandoc, ffmpeg }:
   
   let
     version = "2015.03.24";
  
positive.code:     sha256 = "1m462hcgizdp59s9h62hjwhq4vjrgmck23x2bh5jvb9vjpcfqjxv";
    };
  
    buildInputs = [ python ];
    nativeBuildInputs = [ zip pandoc ];
  
    patchPhase = ''
  
negative.code: 
    configurePhase = ''
      makeFlagsArray=( PREFIX=$out SYSCONFDIR=$out/etc PYTHON=${python}/bin/python )
    '';
  
    postInstall = ''
      # ffmpeg is used for post-processing and fixups
      wrapProgram $out/bin/youtube-dl --prefix PATH : "${ffmpeg}/bin"
    '';
  
    meta = {
  