diff --git a/lib/utils/fs.js b/lib/utils/fs.js
new file mode 100644
index 00000000..c004e240
--- /dev/null
+++ b/lib/utils/fs.js
@@ -0,0 +1,156 @@
+var fs = require('fs');
+var co = require('./co');
+
+exports.access = co.promisify(fs.access);
+exports.accessSync = fs.accessSync;
+exports.appendFile = co.promisify(fs.appendFile);
+exports.appendFileSync = fs.appendFileSync;
+exports.chmod = co.promisify(fs.chmod);
+exports.chmodSync = fs.chmodSync;
+exports.chown = co.promisify(fs.chown);
+exports.chownSync = fs.chownSync;
+exports.close = co.promisify(fs.close);
+exports.closeSync = fs.closeSync;
+exports.constants = fs.constants;
+exports.createReadStream = fs.createReadStream;
+exports.createWriteStream = fs.createWriteStream;
+exports.exists = co.promisify(fs.exists);
+exports.existsSync = fs.existsSync;
+exports.fchmod = co.promisify(fs.fchmod);
+exports.fchmodSync = fs.fchmodSync;
+exports.fchown = co.promisify(fs.fchown);
+exports.fchownSync = fs.fchownSync;
+exports.fdatasync = co.promisify(fs.fdatasync);
+exports.fdatasyncSync = fs.fdatasyncSync;
+exports.fstat = co.promisify(fs.fstat);
+exports.fstatSync = fs.fstatSync;
+exports.fsync = co.promisify(fs.fsync);
+exports.fsyncSync = fs.fsyncSync;
+exports.ftruncate = co.promisify(fs.ftruncate);
+exports.ftruncateSync = fs.ftruncateSync;
+exports.futimes = co.promisify(fs.futimes);
+exports.futimesSync = fs.futimesSync;
+exports.lchmod = co.promisify(fs.lchmod);
+exports.lchmodSync = fs.lchmodSync;
+exports.lchown = co.promisify(fs.lchown);
+exports.lchownSync = fs.lchownSync;
+exports.link = co.promisify(fs.link);
+exports.linkSync = fs.linkSync;
+exports.lstat = co.promisify(fs.lstat);
+exports.lstatSync = fs.lstatSync;
+exports.mkdir = co.promisify(fs.mkdir);
+exports.mkdirSync = fs.mkdirSync;
+exports.mkdtemp = co.promisify(fs.mkdtemp);
+exports.mkdtempSync = fs.mkdtempSync;
+exports.open = co.promisify(fs.open);
+exports.openSync = fs.openSync;
+exports.read = co.promisify(fs.read);
+exports.readSync = fs.readSync;
+exports.readdir = co.promisify(fs.readdir);
+exports.readdirSync = fs.readdirSync;
+exports.readFile = co.promisify(fs.readFile);
+exports.readFileSync = fs.readFileSync;
+exports.readlink = co.promisify(fs.readlink);
+exports.readlinkSync = fs.readlinkSync;
+exports.realpath = co.promisify(fs.realpath);
+exports.realpathSync = fs.realpathSync;
+exports.rename = co.promisify(fs.rename);
+exports.renameSync = fs.renameSync;
+exports.rmdir = co.promisify(fs.rmdir);
+exports.rmdirSync = fs.rmdirSync;
+exports.stat = co.promisify(fs.stat);
+exports.statSync = fs.statSync;
+exports.symlink = co.promisify(fs.symlink);
+exports.symlinkSync = fs.symlinkSync;
+exports.truncate = co.promisify(fs.truncate);
+exports.truncateSync = fs.truncateSync;
+exports.unlink = co.promisify(fs.unlink);
+exports.unlinkSync = fs.unlinkSync;
+exports.unwatchFile = fs.unwatchFile;
+exports.utimes = co.promisify(fs.utimes);
+exports.utimesSync = fs.utimesSync;
+exports.watch = fs.watch;
+exports.watchFile = fs.watchFile;
+exports.write = co.promisify(fs.write);
+exports.writeSync = fs.writeSync;
+exports.writeFile = co.promisify(fs.writeFile);
+exports.writeFileSync = fs.writeFileSync;
+
+exports.mkdirpSync = function mkdirpSync(dir, mode) {
+  var data = getParts(dir);
+  var parts = data.parts;
+  var path = data.path;
+  var i, stat;
+
+  if (mode == null)
+    mode = 488; // 0755
+
+  for (i = 0; i < parts.length; i++) {
+    path += parts[i];
+
+    try {
+      stat = exports.statSync(path);
+      if (!stat.isDirectory())
+        throw new Error('Could not create directory.');
+    } catch (e) {
+      if (e.code === 'ENOENT')
+        exports.mkdirSync(path, mode);
+      else
+        throw e;
+    }
+
+    path += '/';
+  }
+};
+
+exports.mkdirp = co(function* mkdirp(dir, mode) {
+  var data = getParts(dir);
+  var parts = data.parts;
+  var path = data.path;
+  var i, stat;
+
+  if (mode == null)
+    mode = 488; // 0755
+
+  for (i = 0; i < parts.length; i++) {
+    path += parts[i];
+
+    try {
+      stat = yield exports.stat(path);
+      if (!stat.isDirectory())
+        throw new Error('Could not create directory.');
+    } catch (e) {
+      if (e.code === 'ENOENT')
+        yield exports.mkdir(path, mode);
+      else
+        throw e;
+    }
+
+    path += '/';
+  }
+});
+
+function getParts(path) {
+  var parts;
+
+  path = path.replace(/\\/g, '/');
+  path = path.replace(/(^|\/)\.\//, '$1');
+  path = path.replace(/\/+\.?$/, '');
+  parts = path.split(/\/+/);
+  path = '';
+
+  if (process.platform === 'win32') {
+    if (parts[0].indexOf(':') !== -1)
+      path = parts.shift() + '/';
+  }
+
+  if (parts[0].length === 0) {
+    parts.shift();
+    path = '/';
+  }
+
+  return {
+    path: path,
+    parts: parts
+  };
+}