anchor.diff:          curlWrappersSupport = (!php7) && (config.php.curlWrappers or true);
           gettextSupport = config.php.gettext or true;
           pcntlSupport = config.php.pcntl or true;
  -        pcreSupport = config.php.pcreExternal or true;
           postgresqlSupport = config.php.postgresql or true;
           pdo_pgsqlSupport = config.php.pdo_pgsql or true;
           readlineSupport = config.php.readline or true;
  
positive.code:       enableParallelBuilding = true;
  
        nativeBuildInputs = [ pkgconfig ];
        buildInputs = [ flex bison ]
          ++ lib.optional stdenv.isLinux systemd;
  
        CXXFLAGS = lib.optional stdenv.cc.isClang "-std=c++11";
  
negative.code: 
          pcntl = {
            configureFlags = [ "--enable-pcntl" ];
          };
  
          readline = {
  