anchor.diff:    # cupsd.conf tells cupsd to use this tree.
     bindir = pkgs.buildEnv {
       name = "cups-progs";
  -    paths = cfg.drivers;
  +    paths =
  +      [ cups additionalBackends cups_filters pkgs.ghostscript ]
  +      ++ cfg.drivers;
       pathsToLink = [ "/lib/cups" "/share/cups" "/bin" "/etc/cups" ];
       postBuild = cfg.bindirCmds;
       ignoreCollisions = true;
  
positive.code:           [ config.environment.etc."cups/cups-browsed.conf".source
            ];
        };
  
      services.printing.drivers =
        [ cups pkgs.ghostscript pkgs.cups_filters additionalBackends
          pkgs.perl pkgs.coreutils pkgs.gnused pkgs.bc pkgs.gawk pkgs.gnugrep
        ];
  
      services.printing.cupsFilesConf =
        ''
  
negative.code: 
        drivers = mkOption {
          type = types.listOf types.path;
          default = [];
          example = literalExample "[ pkgs.splix ]";
          description = ''
            CUPS drivers to use. Drivers provided by CUPS, cups-filters, Ghostscript
  