anchor.diff:  
   
   let baseName = "libaacs";
  -    version  = "0.3.0";
  +    version  = "0.8.0";
   in
   
   stdenv.mkDerivation {
  
positive.code: 
    src = fetchurl {
      url = "http://download.videolan.org/pub/videolan/${baseName}/${version}/${baseName}-${version}.tar.bz2";
      sha256 = "bf92dab1a6a8ee08a55e8cf347c2cda49e6535b52e85bb1e92e1cfcc8ecec22c";
    };
  
    buildInputs = [libgcrypt];
  
    meta = {
      homepage = http://www.videolan.org/developers/libbluray.html;
      description = "Library to access Blu-Ray disks for video playback";
      license = stdenv.lib.licenses.lgpl21;
    };
  }
  
negative.code: { stdenv, fetchurl, libgcrypt, yacc, flex }:
  
  # library that allows libbluray to play AACS protected bluray disks
  # libaacs does not infringe DRM's right or copyright. See the legal page of the website for more info.
  