https://github.com/python-xlib/python-xlib/issues/257

diff --git /dev/null python-xlib-0.33/mcookie
new file mode 100755
index 000000000..0aa16ccbd
--- /dev/null
+++ python-xlib-0.33/mcookie
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+dd if=/dev/urandom of=/dev/stdout bs=512 count=1 2>/dev/null | md5sum | awk '{print $1}'