anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "pcsclite";
  -  version = "1.9.1";
  +  version = "1.9.4";
   
     outputs = [ "bin" "out" "dev" "doc" "man" ];
   
     src = fetchurl {
       url = "https://pcsclite.apdu.fr/files/pcsc-lite-${version}.tar.bz2";
  -    sha256 = "sha256-c8R4m3h2qDOnD0k82iFlXf6FaJ2bfilwHCQyduVeaDo=";
  +    sha256 = "sha256:0jqwnpywk9ka3q88b1k93p8s0xhmx1isdpcqa80nd8p04z1am34a";
     };
   
     patches = [ ./no-dropdir-literals.patch ];
  
positive.code: 
    enableParallelBuilding = true;
  
    nativeBuildInputs = [ autoreconfHook pkg-config perl ];
  
    buildInputs = [ python3 ]
      ++ lib.optionals stdenv.isLinux [ dbus polkit systemd ]
  
negative.code: , lib
  , fetchurl
  , autoreconfHook
  , autoconf-archive
  , pkg-config
  , perl
  , python3
  