anchor.diff:    nativeBuildInputs = [ yacc flex ];
   
     meta = with stdenv.lib; {
  -    homepage = http://www.videolan.org/developers/libbluray.html;
  +    homepage = https://www.videolan.org/developers/libaacs.html;
       description = "Library to access AACS protected Blu-Ray disks";
       license = licenses.lgpl21;
       maintainers = with maintainers; [ abbradar ];
  
positive.code: 
    src = fetchurl {
      url = "http://download.videolan.org/pub/videolan/${baseName}/${version}/${baseName}-${version}.tar.bz2";
      sha256 = "155sah8z4vbp6j3sq9b17mcn6rj1938ijszz97m8pd2cgif58i2y";
    };
  
    buildInputs = [ libgcrypt libgpgerror ];
  
negative.code: # https://wiki.archlinux.org/index.php/BluRay
  
  let baseName = "libaacs";
      version  = "0.8.1";
  in
  
  stdenv.mkDerivation {
  