anchor.diff:          outputHash
           outputHashAlgo
           urls;
  -      sha512Urls = map (n: "${n}.sha512") src.urls;
  +      fullOpts = {
  +        sha512Urls = map (n: "${n}.sha512") src.urls;
  +      };
         failEarly = true;
       };
     };
  
positive.code:     boolEn
      boolWt;
  
    version  = "1.0.2";
  in
  stdenv.mkDerivation rec {
    name = "libbluray-${version}";
  
negative.code:     "--${boolEn (jdk != null)}-bdjava"
      "--enable-udf"
      "--${boolEn (jdk != null)}-bdjava-jar"
      "--with-libxml2"
      "--with-freetype"
      "--with-fontconfig"
  