diff --git a/lib/mkdir.js b/lib/mkdir.js
index dff6885..61857ae 100644
--- a/lib/mkdir.js
+++ b/lib/mkdir.js
@@ -1,6 +1,100 @@
-var mkdirp = require('mkdirp')
+var path = require('path');
+var fs = require('fs');
+
+function mkdirP (p, opts, f, made) {
+    if (typeof opts === 'function') {
+        f = opts;
+        opts = {};
+    }
+    else if (!opts || typeof opts !== 'object') {
+        opts = { mode: opts };
+    }
+    
+    var mode = opts.mode;
+    var xfs = opts.fs || fs;
+    
+    if (mode === undefined) {
+        mode = 0777 & (~process.umask());
+    }
+    if (!made) made = null;
+    
+    var cb = f || function () {};
+    p = path.resolve(p);
+    
+    xfs.mkdir(p, mode, function (er) {
+        if (!er) {
+            made = made || p;
+            return cb(null, made);
+        }
+        switch (er.code) {
+            case 'ENOENT':
+                mkdirP(path.dirname(p), opts, function (er, made) {
+                    if (er) cb(er, made);
+                    else mkdirP(p, opts, cb, made);
+                });
+                break;
+
+            // In the case of any other error, just see if there's a dir
+            // there already.  If so, then hooray!  If not, then something
+            // is borked.
+            default:
+                xfs.stat(p, function (er2, stat) {
+                    // if the stat fails, then that's super weird.
+                    // let the original error be the failure reason.
+                    if (er2 || !stat.isDirectory()) cb(er, made)
+                    else cb(null, made);
+                });
+                break;
+        }
+    });
+}
+
+mkdirP.sync = function sync (p, opts, made) {
+    if (!opts || typeof opts !== 'object') {
+        opts = { mode: opts };
+    }
+    
+    var mode = opts.mode;
+    var xfs = opts.fs || fs;
+    
+    if (mode === undefined) {
+        mode = 0777 & (~process.umask());
+    }
+    if (!made) made = null;
+
+    p = path.resolve(p);
+
+    try {
+        xfs.mkdirSync(p, mode);
+        made = made || p;
+    }
+    catch (err0) {
+        switch (err0.code) {
+            case 'ENOENT' :
+                made = sync(path.dirname(p), opts, made);
+                sync(p, opts, made);
+                break;
+
+            // In the case of any other error, just see if there's a dir
+            // there already.  If so, then hooray!  If not, then something
+            // is borked.
+            default:
+                var stat;
+                try {
+                    stat = xfs.statSync(p);
+                }
+                catch (err1) {
+                    throw err0;
+                }
+                if (!stat.isDirectory()) throw err0;
+                break;
+        }
+    }
+
+    return made;
+};
 
 module.exports = {
-  mkdirs: mkdirp,
-  mkdirsSync: mkdirp.sync
+  mkdirs: mkdirP,
+  mkdirsSync: mkdirP.sync
 }