anchor.diff:      buildInputs = [ ExtUtilsCppGuess ExtUtilsTypemapsDefault ExtUtilsXSpp ModuleBuildWithXSpp TestDeep ];
     };
   
  -  MathComplex = null; # part of Perl 5.22
  -
     MathConvexHullMonotoneChain = buildPerlPackage rec {
       name = "Math-ConvexHull-MonotoneChain-0.01";
       src = fetchurl {
  
positive.code:        license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
       };
    };
  
    constantdefer = pkgs.perlPackages.constant-defer;
  
    constant-defer = buildPerlPackage rec {
      name = "constant-defer-6";
  
negative.code:       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
      };
    };
  
    LWPProtocolHttps = buildPerlPackage rec {
      name = "LWP-Protocol-https-6.07";
  