anchor.diff:        NIX_CONF_DIR=/nix/etc/nix
         ${pkgs.lib.concatStrings (map (job: job + "\n") config.services.cron.systemCronJobs)}
       '';
  +
  +  # Vixie cron requires build-time configuration for the sendmail path.
  +  cronNixosPkg = pkgs.cron.override {
  +    # The mail.nix nixos module, if there is any local mail system enabled,
  +    # should have sendmail in this path.
  +    sendmailPath = "/var/setuid-wrappers/sendmail";
  +  };
     
   in
   
  
positive.code:         mode = "0600"; # Cron requires this.
        };
  
      environment.systemPackages = [pkgs.cron];
  
      jobs.cron =
        { description = "Cron daemon";
  
negative.code:             fi
            '';
  
          exec = "${cronNixosPkg}/sbin/cron -n";
        };
  
    };
  