anchor.diff:  { stdenv, lib, pkgs, fetchgit, php, autoconf, pkgconfig, re2c
  -, gettext, bzip2, curl, libxml2, openssl, gmp, icu, oniguruma, libsodium
  +, gettext, bzip2, curl, libxml2, openssl, gmp, icu64, oniguruma, libsodium
   , html-tidy, libzip, zlib, pcre, pcre2, libxslt, aspell, openldap, cyrus_sasl
   , uwimap, pam, libiconv, enchant1, libXpm, gd, libwebp, libjpeg, libpng
   , freetype, libffi, freetds, postgresql, sqlite, net-snmp, unixODBC, libedit
  
positive.code:         enable = (!stdenv.isDarwin); }
        # interbase (7.3, 7.2)
        { name = "intl";
          buildInputs = [ icu ];
          patches = lib.optional (lib.versionOlder php.version "7.4") (fetchpatch {
            url = "https://github.com/php/php-src/commit/93a9b56c90c334896e977721bfb3f38b1721cec6.patch";
            sha256 = "055l40lpyhb0rbjn6y23qkzdhvpp7inbnn6x13cpn4inmhjqfpg4";
  
negative.code:       nativeBuildInputs = [ pkgs.pkgconfig ];
        buildInputs = with pkgs; [
          cyrus_sasl
          icu64
          openssl
          snappy
          zlib
  