anchor.diff:        buildInputs = [ unzip ];
         meta = a.meta // {
           platforms = elasticsearch-oss.meta.platforms;
  -        maintainers = (a.meta.maintainers or []) ++ [ maintainers.offline ];
  +        maintainers = (a.meta.maintainers or []) ++ (with stdenv.lib.maintainers; [ offline ]);
         };
       });
   in {
  
positive.code: { pkgs,  stdenv, fetchurl, unzip, elasticsearch-oss, javaPackages, elk6Version }:
  
  with pkgs.lib;
  
  let
    esPlugin = a@{
  
negative.code:       url = "https://github.com/vhyza/elasticsearch-analysis-lemmagen/releases/download/v${version}/${name}-plugin.zip";
        sha256 = "1m4z05wixjrq4nlbdjyhvprkrwxjym8aba18scmzfn25fhbjgvkz";
      };
      meta = with stdenv.lib; {
        homepage = https://github.com/vhyza/elasticsearch-analysis-lemmagen;
        description = "LemmaGen Analysis plugin provides jLemmaGen lemmatizer as Elasticsearch token filter";
        license = licenses.asl20;
      };
    };
  
    discovery-ec2 = esPlugin rec {
      name = "elasticsearch-discovery-ec2-${version}";
      pluginName = "discovery-ec2";
      version = "${elk6Version}";
  