anchor.diff:  in {
     options = {
       services.sysstat = {
  -      enable = mkOption {
  -        type = types.bool;
  -        default = false;
  -        description = ''
  -          Whether to enable sar system activity collection.
  -        '';
  -      };
  +      enable = mkEnableOption "sar system activity collection";
   
         collect-frequency = mkOption {
  +        type = types.str;
           default = "*:00/10";
           description = ''
             OnCalendar specification for sysstat-collect
  
positive.code:     systemd.services.sysstat = {
        description = "Resets System Activity Logs";
        wantedBy = [ "multi-user.target" ];
        preStart = "test -d /var/log/sa || mkdir -p /var/log/sa";
  
        serviceConfig = {
          User = "root";
          RemainAfterExit = true;
          Type = "oneshot";
          ExecStart = "${pkgs.sysstat}/lib/sa/sa1 --boot";
        };
      };
  
  
negative.code:       };
  
        collect-args = mkOption {
          type = types.str;
          default = "1 1";
          description = ''
            Arguments to pass sa1 when collecting statistics
  