anchor.diff:  { stdenv, autoconf, automake, pkgconfig, gettext, libtool, bison
  -, flex, which, subversion, fetchsvn, makeWrapper, libftdi, libusb-compat-0_1, readline
  +, flex, which, subversion, fetchurl, makeWrapper, libftdi, libusb-compat-0_1, readline
   , python3
   , svfSupport ? true
   , bsdlSupport ? true
  
positive.code:     (stdenv.lib.enableFeature jedecSupport "jedec-exp")
    ];
  
    preConfigure = "./autogen.sh";
  
    meta = {
      description = "Enhanced, modern tool for communicating over JTAG with flash chips, CPUs,and many more";
      homepage = "http://urjtag.org/";
  
negative.code: , jedecSupport ? true
  }:
  
  stdenv.mkDerivation rec {
    version = "2019.12";
    pname = "urjtag";
  
    src = fetchurl {
      url = "https://downloads.sourceforge.net/project/urjtag/urjtag/${version}/urjtag-${version}.tar.xz";
      sha256 = "1k2vmvvarik0q3llbfbk8ad35mcns7w1ln9gla1mn7z9c6x6x90r";
    };
  
    nativeBuildInputs = [ pkgconfig ];
  