Binaries with "fs" SD card support NEEDED!!!

using this:

function onInit() {
  var s = new SPI();
  E.connectSDCard(s, NodeMCU.D4);
  s.setup({mosi:NodeMCU.D13, miso:NodeMCU.D12, sck:NodeMCU.D14});
  // see what's on the device
  console.log(require("fs").readdirSync());
}

onInit();

i still get the same output:

 _____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v86.113 Copyright 2016 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
Flash map 1MB:512/512, manuf 0xe0 chip 0x4014
>echo(0);
ERROR: Unable to mount SD card : NOT_READY
undefined
=undefined
>