anchor.diff: -{ lib, buildGoModule, fetchurl, fetchFromGitHub }:
  +{ lib, buildGoModule, fetchurl, fetchFromGitHub, nixosTests }:
   
   buildGoModule rec {
     pname = "grafana";
  -  version = "7.0.4";
  +  version = "7.1.3";
   
     excludedPackages = [ "release_publisher" ];
   
  
positive.code:     mv grafana-*/{public,conf,tools} $out/share/grafana/
    '';
  
    meta = with lib; {
      description = "Gorgeous metric viz, dashboards & editors for Graphite, InfluxDB & OpenTSDB";
      license = licenses.asl20;
  
negative.code:     rev = "v${version}";
      owner = "grafana";
      repo = "grafana";
      sha256 = "1acvvqsgwfrkqmbgzdxfa8shwmx7c91agaqv3gsfgpqkqwp3pnmh";
    };
  
    srcStatic = fetchurl {
      url = "https://dl.grafana.com/oss/release/grafana-${version}.linux-amd64.tar.gz";
      sha256 = "0c72xmazr3rgiccrqcy02w30159vsq9d78dkqf5c2yjqn8zzwf98";
    };
  
    vendorSha256 = "11zi7a4mqi80m5z4zcrc6wnzhgk6xnmzisrk2v4vpmfp33s732lz";
  
    postPatch = ''
      substituteInPlace pkg/cmd/grafana-server/main.go \
  