new file mode 100644
--- /dev/null
+++ b/build/mach_bootstrap.py
@@ -0,0 +1,14 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from __future__ import unicode_literals
+
+import os, sys
+
+def bootstrap(topsrcdir, mozilla_dir=None):
+    if mozilla_dir is None:
+        mozilla_dir = os.path.join(topsrcdir, 'mozilla')
+    sys.path[0:0] = [mozilla_dir]
+    import build.mach_bootstrap
+    return build.mach_bootstrap.bootstrap(topsrcdir, mozilla_dir)

--- a/build/pymake/make.py
+++ b/build/pymake/make.py
@@ -1,8 +1,9 @@
+#!/usr/bin/env python
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 # This is a wrapper around mozilla-central's pymake. If that isn't found then
 # this uses client.py to pull it in.
 
 import os