anchor.diff:    # FIXME
     sourceDateEpochWarn = true;
   
  -  meta = with stdenv.lib; {
  +  meta = with lib; {
       description = "Unicode Character Database";
       homepage = http://www.unicode.org/;
       license = licenses.bsd3;
  
positive.code: { stdenv
  , fetchurl
  , unzip
  }:
  
  let
    version = "9.0.0";
  in
  stdenv.mkDerivation rec {
    name = "unicode-character-database-${version}";
  
negative.code:   srcs = [
      (fetchurl {
        url = "http://www.unicode.org/Public/${version}/ucd/UCD.zip";
        multihash = "QmTtBP7ZFuUsWYdyUNQhinWbEDQxnvyPqA49VarVNst5As";
        sha256 = "25ba51a0d4c6fa41047b7a5e5733068d4a734588f055f61e85f450097834a0a6";
      })
      (fetchurl {
        url = "http://www.unicode.org/Public/${version}/ucd/Unihan.zip";
        multihash = "QmUguLv4vL2V6EvxvksexsnEjyvXqoP74LyTKn95vaPdWy";
        sha256 = "6e4553f3b5fffe0d312df324d020ef1278d9595932ae03f4e8a2d427de83cdcd";
      })
    ];
  
  