anchor.diff:  {config, pkgs, fetchurl, fetchFromGitHub, stdenv, gnused, perl, overrides,
     buildPackages}:
   
  -# cpan2nix assumes that perl-packages.nix will be used only with perl 5.28.1 or above
  -assert stdenv.lib.versionAtLeast perl.version "5.28.1";
  +# cpan2nix assumes that perl-packages.nix will be used only with perl 5.28.2 or above
  +assert stdenv.lib.versionAtLeast perl.version "5.28.2";
   let
     inherit (stdenv.lib) maintainers;
     self = _self // (overrides pkgs);
  
positive.code:     };
      buildInputs = [ pkgs.zookeeper_mt ];
      # fix "error: format not a string literal and no format arguments [-Werror=format-security]"
      hardeningDisable = stdenv.lib.optional (stdenv.lib.versionAtLeast perl.version "5.28") "format";
      NIX_CFLAGS_COMPILE = "-I${pkgs.zookeeper_mt}/include";
      NIX_CFLAGS_LINK = "-L${pkgs.zookeeper_mt.out}/lib -lzookeeper_mt";
      meta = {
  
negative.code:     buildInputs = [ Filepushd ];
    };
  
    ModuleExtractUse = buildPerlModule rec {
       name = "Module-ExtractUse-0.343";
       src = fetchurl {
  