anchor.diff:            serviceConfig = {
               StateDirectory = "tuptime";
               Type = "oneshot";
  -            User = "tuptime";
  +            User = "_tuptime";
               RemainAfterExit = true;
               ExecStart = "${pkgs.tuptime}/bin/tuptime -x";
               ExecStop = "${pkgs.tuptime}/bin/tuptime -xg";
  
positive.code: 
      environment.systemPackages = [ pkgs.tuptime ];
  
      users.users.tuptime.description = "tuptime database owner";
  
      systemd = {
        services = {
  
negative.code:           serviceConfig = {
              StateDirectory = "tuptime";
              Type = "oneshot";
              User = "_tuptime";
              ExecStart = "${pkgs.tuptime}/bin/tuptime -x";
            };
          };
  