anchor.diff:  { stdenv, fetchFromGitHub, autoreconfHook, pkgconfig, zlib, readline, openssl
   , libiconv, pcsclite, libassuan, libXt
   , docbook_xsl, libxslt, docbook_xml_dtd_412
  -, Carbon, PCSC
  +, Carbon, PCSC, buildPackages
   , withApplePCSC ? stdenv.isDarwin
   }:
   
  
positive.code:       else
          "${stdenv.lib.getLib pcsclite}/lib/libpcsclite${stdenv.hostPlatform.extensions.sharedLibrary}"
        }"
    ];
  
    PCSC_CFLAGS = stdenv.lib.optionalString withApplePCSC
  
negative.code:     sha256 = "10575gb9l38cskq7swyjp0907wlziyxg4ppq33ndz319dsx69d87";
    };
  
    nativeBuildInputs = [ pkgconfig autoreconfHook ];
    buildInputs = [
      zlib readline openssl libassuan
      libXt libxslt libiconv docbook_xml_dtd_412
    ]
    ++ stdenv.lib.optional stdenv.isDarwin Carbon
  