anchor.diff:      };
     };
   
  +  DataIEEE754 = buildPerlPackage {
  +    name = "Data-IEEE754-0.02";
  +    src = fetchurl {
  +      url = mirror://cpan/authors/id/M/MA/MAXMIND/Data-IEEE754-0.02.tar.gz;
  +      sha256 = "07b73dlxd0qmxgkkrpa2xr61y18v3adlf1qgnl9k90kj8q9spx66";
  +    };
  +    buildInputs = [ TestBits ];
  +    meta = {
  +      description = "Pack and unpack big-endian IEEE754 floats and doubles";
  +      license = with stdenv.lib.licenses; [ artistic2 ];
  +    };
  +  };
  +
     DataInteger = buildPerlModule rec {
       name = "Data-Integer-0.006";
       src = fetchurl {
  
positive.code:     meta = {
        homepage = https://github.com/mattp-/Data-Perl;
        description = "Base classes wrapping fundamental Perl data types";
        license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
      };
    };
  
negative.code:     };
      makeMakerFlags = "LIBS=-L${pkgs.geoip}/lib INC=-I${pkgs.geoip}/include";
      doCheck = false; # seems to access the network
    };
  
    GeoIP2 = buildPerlPackage {
      name = "GeoIP2-2.006001";
      src = fetchurl {
        url = mirror://cpan/authors/id/M/MA/MAXMIND/GeoIP2-2.006001.tar.gz;
        sha256 = "05pb8bj2dkfcn8z56f8dcs76x65xcn05fywm7vifmfh39qgkmm62";
      };
      propagatedBuildInputs = [ JSONMaybeXS LWPProtocolHttps MaxMindDBReader ParamsValidate Throwable ];
      buildInputs = [ PathClass TestFatal TestNumberDelta ];
      meta = {
        description = "Perl API for MaxMind's GeoIP2 web services and databases";
        license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
      };
    };
  
    GetoptArgvFile = buildPerlPackage rec {
  