anchor.diff:      propagatedBuildInputs = [ ClassAccessor ParamsValidate ];
     };
   
  +  MathInt128 = buildPerlPackage {
  +    name = "Math-Int128-0.22";
  +    src = fetchurl {
  +      url = mirror://cpan/authors/id/S/SA/SALVA/Math-Int128-0.22.tar.gz;
  +      sha256 = "1g0ra7ldv4fz3kqqg45dlrfavi2abfmlhf0py5ank1jk2x0clc56";
  +    };
  +    propagatedBuildInputs = [ MathInt64 ];
  +    meta = {
  +      description = "Manipulate 128 bits integers in Perl";
  +      license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
  +    };
  +  };
  +
  +  MathInt64 = buildPerlPackage {
  +    name = "Math-Int64-0.54";
  +    src = fetchurl {
  +      url = mirror://cpan/authors/id/S/SA/SALVA/Math-Int64-0.54.tar.gz;
  +      sha256 = "0lfkc0cry65lnsi28gjyz2kvdkanbhhpc0pyrswsczj3k3k53z6w";
  +    };
  +    meta = {
  +      description = "Manipulate 64 bits integers in Perl";
  +      license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
  +    };
  +  };
  +
     MathPlanePath = buildPerlPackage rec {
       name = "Math-PlanePath-126";
       src = fetchurl {
  
positive.code:     meta = {
        homepage = https://github.com/semifor/Net-Twitter-Lite;
        description = "A perl interface to the Twitter API";
        license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
      };
    };
  
negative.code:     buildInputs = [ PathClass TestBits TestFatal TestNumberDelta TestRequires ];
      meta = {
        description = "Read MaxMind DB files and look up IP addresses";
        license = with stdenv.lib.licenses; [ artistic2 ];
      };
    };
  
    MaxMindDBReaderXS = buildPerlModule {
      name = "MaxMind-DB-Reader-XS-1.000007";
      src = fetchurl {
        url = mirror://cpan/authors/id/M/MA/MAXMIND/MaxMind-DB-Reader-XS-1.000007.tar.gz;
        sha256 = "1wg1x1pqamapfhn6rbffqipncgs15k99q34agdamv76i6782ny8r";
      };
      propagatedBuildInputs = [ MathInt128 MaxMindDBReader ];
      buildInputs = [ NetWorks PathClass TestFatal TestNumberDelta TestRequires ];
      meta = {
        description = "Fast XS implementation of MaxMind DB reader";
        license = with stdenv.lib.licenses; [ artistic2 ];
      };
    };
  