diff --git a/shell.js b/shell.js
index d33deef..43c9360 100644
--- a/shell.js
+++ b/shell.js
@@ -159,37 +159,7 @@ exports.mv = wrap('mv', _mv);
 //@ ```
 //@
 //@ Creates directories.
-function _mkdir(options, dirs) {
-  options = parseOptions(options, {
-    'p': 'fullpath'
-  });
-  if (!dirs)
-    error('no paths given');
-
-  if (typeof dirs === 'string')
-    dirs = [].slice.call(arguments, 1);
-  // if it's array leave it as it is
-
-  dirs.forEach(function(dir) {
-    if (fs.existsSync(dir)) {
-      if (!options.fullpath)
-          error('path already exists: ' + dir, true);
-      return; // skip dir
-    }
-
-    // Base dir does not exist, and no -p option given
-    var baseDir = path.dirname(dir);
-    if (!fs.existsSync(baseDir) && !options.fullpath) {
-      error('no such file or directory: ' + baseDir, true);
-      return; // skip dir
-    }
-
-    if (options.fullpath)
-      mkdirSyncRecursive(dir);
-    else
-      fs.mkdirSync(dir, parseInt('0777', 8));
-  });
-} // mkdir
+var _mkdir = require('./src/mkdir');
 exports.mkdir = wrap('mkdir', _mkdir);
 
 //@
@@ -1093,23 +1063,6 @@ function wrap(cmd, fn, options) {
   };
 } // wrap
 
-// Recursively creates 'dir'
-function mkdirSyncRecursive(dir) {
-  var baseDir = path.dirname(dir);
-
-  // Base dir exists, no recursion necessary
-  if (fs.existsSync(baseDir)) {
-    fs.mkdirSync(dir, parseInt('0777', 8));
-    return;
-  }
-
-  // Base dir does not exist, go recursive
-  mkdirSyncRecursive(baseDir);
-
-  // Base dir created, can create dir
-  fs.mkdirSync(dir, parseInt('0777', 8));
-}
-
 // e.g. 'shelljs_a5f185d0443ca...'
 function randomFileName() {
   function randomHash(count) {
diff --git a/src/mkdir.js b/src/mkdir.js
new file mode 100644
index 0000000..927e33e
--- /dev/null
+++ b/src/mkdir.js
@@ -0,0 +1,53 @@
+var common = require('./common');
+var fs = require('fs');
+var path = require('path');
+
+// Recursively creates 'dir'
+function mkdirSyncRecursive(dir) {
+  var baseDir = path.dirname(dir);
+
+  // Base dir exists, no recursion necessary
+  if (fs.existsSync(baseDir)) {
+    fs.mkdirSync(dir, parseInt('0777', 8));
+    return;
+  }
+
+  // Base dir does not exist, go recursive
+  mkdirSyncRecursive(baseDir);
+
+  // Base dir created, can create dir
+  fs.mkdirSync(dir, parseInt('0777', 8));
+}
+
+function _mkdir(options, dirs) {
+  options = common.parseOptions(options, {
+    'p': 'fullpath'
+  });
+  if (!dirs)
+    common.error('no paths given');
+
+  if (typeof dirs === 'string')
+    dirs = [].slice.call(arguments, 1);
+  // if it's array leave it as it is
+
+  dirs.forEach(function(dir) {
+    if (fs.existsSync(dir)) {
+      if (!options.fullpath)
+          common.error('path already exists: ' + dir, true);
+      return; // skip dir
+    }
+
+    // Base dir does not exist, and no -p option given
+    var baseDir = path.dirname(dir);
+    if (!fs.existsSync(baseDir) && !options.fullpath) {
+      common.error('no such file or directory: ' + baseDir, true);
+      return; // skip dir
+    }
+
+    if (options.fullpath)
+      mkdirSyncRecursive(dir);
+    else
+      fs.mkdirSync(dir, parseInt('0777', 8));
+  });
+} // mkdir
+module.exports = _mkdir;