anchor.diff:        sha256 = "1qa7jwhy78byvfzpjnn5k2jm30sb5m1z6k2m79iy6gg2xj41nrq0";
       };
     };
  -
  -  ExtUtilsParseXS = null; # part of Perl 5.28
   
     ExtUtilsPkgConfig = buildPerlPackage rec {
       name = "ExtUtils-PkgConfig-1.16";
  
positive.code:     };
    };
  
    SelfLoader = null; # part of Perl 5.28
  
    SerealDecoder = buildPerlPackage rec {
      name = "Sereal-Decoder-4.005";
      src = fetchurl {
  
negative.code:     };
    };
  
    ExtUtilsCChecker = buildPerlModule rec {
      name = "ExtUtils-CChecker-0.10";
      src = fetchurl {
  