anchor.diff:  
       systemd.services.dd-agent = {
         description = "Datadog agent monitor";
  -      path = [ pkgs."dd-agent" pkgs.python pkgs.sysstat pkgs.procps ];
  +      path = [ pkgs."dd-agent" pkgs.python pkgs.sysstat pkgs.procps pkgs.gohai ];
         wantedBy = [ "multi-user.target" ];
         serviceConfig = {
           ExecStart = "${pkgs.dd-agent}/bin/dd-agent foreground";
  
positive.code:     instances:
        - use_mount: no
    '';
    
    networkConfig = pkgs.writeText "network.yaml" ''
      init_config:
  
  
negative.code:     processConfig = mkOption {
        description = ''
          Process integration configuration
  
          See http://docs.datadoghq.com/integrations/process/
        '';
        default = null;
  