anchor.diff:        };
   
       services.printing.drivers = [ pkgs.cups pkgs.ghostscript additionalBackends ];
  -    services.printing.cupsdConf = 
  +    services.printing.cupsdConf =
         ''
           LogLevel info
   
  
positive.code:   additionalBackends = pkgs.stdenv.mkDerivation {
      name = "additional-cups-backends";
      builder = pkgs.writeScript "additional-backends-builder.sh" ''
        ${pkgs.coreutils}/bin/mkdir -p $out/lib/cups/backend
        ${pkgs.coreutils}/bin/ln -s ${pkgs.samba}/bin/smbspool $out/lib/cups/backend/smb
  
        # Provide support for printing via HTTPS.
        ${pkgs.coreutils}/bin/ln -s ipp $out/lib/cups/backend/https
      '';
    };
  
  
negative.code:       '';
  
    };
  }
  