anchor.diff:      };
     };
   
  +
     ExtUtilsCppGuess = buildPerlModule rec {
       name = "ExtUtils-CppGuess-0.07";
       src = fetchurl {
  
positive.code:     };
    };
  
    TextCSV = buildPerlPackage rec {
      name = "Text-CSV-1.10";
      src = fetchurl {
  
negative.code:     };
    };
  
    ConfigAutoConf = buildPerlPackage {
      name = "Config-AutoConf-0.22";
      src = fetchurl {
        url = mirror://cpan/authors/id/A/AM/AMBS/Config/Config-AutoConf-0.22.tar.gz;
        sha256 = "1zk2xfvxd3yn3299i13vn5wm1c7jxgr7z3h0yh603xs2h9cg79wc";
      };
      propagatedBuildInputs = [ CaptureTiny ];
      meta = {
        description = "A module to implement some of AutoConf macros in pure perl.";
        license = "perl5";
      };
    };
  
    ConfigGeneral = buildPerlPackage {
      name = "Config-General-2.51";
      src = fetchurl {
  