anchor.diff:        httprouter
         logrus
         net
  -      prometheus.client_golang
  -      prometheus.log
  +      prometheus_client_golang
  +      prometheus_log
         yaml-v2
       ];
   
  
positive.code:     propagatedBuildInputs = [ logrus ];
    };
  
    prometheus.mesos-exporter = buildFromGitHub {
      rev = "0.1.0";
      owner = "prometheus";
      repo = "mesos_exporter";
      sha256 = "059az73j717gd960g4jigrxnvqrjh9jw1c324xpwaafa0bf10llm";
      buildInputs = [ mesos-stats prometheus.client_golang glog ];
      meta = with stdenv.lib; {
        description = "Export Mesos metrics to Prometheus";
        homepage = https://github.com/prometheus/mesos_exporter;
  
negative.code:     };
    };
  
    prometheus_nginx-exporter = buildFromGitHub {
      rev = "2cf16441591f6b6e58a8c0439dcaf344057aea2b";
      date = "2015-06-01";
      owner = "discordianfish";
      repo = "nginx_exporter";
      sha256 = "0p9j0bbr2lr734980x2p8d67lcify21glwc5k3i3j4ri4vadpxvc";
      buildInputs = [ prometheus_client_golang prometheus_log ];
      meta = with stdenv.lib; {
        description = "Metrics relay from nginx stats to Prometheus";
        homepage = https://github.com/discordianfish/nginx_exporter;
  