anchor.diff:    elasticsearch_kopf = esPlugin rec {
       name = "elasticsearch-kopf-${version}";
       pluginName = "elasticsearch-kopf";
  -    version = "1.4.7";
  +    version = "1.5.7";
       src = fetchurl {
         url = "https://github.com/lmenezes/elasticsearch-kopf/archive/v${version}.zip";
  -      sha256 = "17r9mmfjnraswij1glmglljga4i4mfiraivxmai6giwmm2grwlz3";
  +      sha256 = "0mq6jmjb4ldi03m431kzr7ly0bf7mdim7s5dx4wplb85gyhscns1";
       };
       meta = {
         homepage = https://github.com/lmenezes/elasticsearch-kopf;
  
positive.code:   elasticsearch_river_jdbc = esPlugin rec {
      name = "elasticsearch-river-jdbc-${version}";
      pluginName = "elasticsearch-river-jdbc";
      version = "1.3.0.4";
      src = fetchurl {
        url = "http://xbib.org/repository/org/xbib/elasticsearch/plugin/elasticsearch-river-jdbc/${version}/${name}-plugin.zip";
        sha256 = "0272l6cr032iccwwa803shzfjg3505jc48d9qdazrwxjmnlkkzqk";
      };
      meta = {
        homepage = "https://github.com/jprante/elasticsearch-river-jdbc";
  
negative.code:     name = pname + "-" + version;
      pname = "elasticsearch-river-twitter";
      pluginName = "elasticsearch/" + pname + "/" + version;
      version = "2.5.0";
  
      src = fetchurl {
        url = "http://download.elasticsearch.org/elasticsearch/${pname}/${name}.zip";
        sha256 = "0851yrmyrpp6whyxk34ykcj7b28f90w0nvkrhvl49dwqgr5s4mn4";
      };
  
      meta = {
  