diff --git a/Vagrantfile b/Vagrantfile
index 3399321..2889573 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -5,9 +5,12 @@ ROOT = File.dirname(File.expand_path(__FILE__))
 # Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
 VAGRANTFILE_API_VERSION = '2'
 
-BASE_BOX_URL    = ENV['BASE_BOX_URL'   ] || "https://oss-binaries.phusionpassenger.com/vagrant/boxes/"
-VAGRANT_BOX_URL = ENV['VAGRANT_BOX_URL'] || BASE_BOX_URL + "ubuntu-12.04.3-amd64-vbox.box"
-VMWARE_BOX_URL  = ENV['VMWARE_BOX_URL' ] || BASE_BOX_URL + "ubuntu-12.04.3-amd64-vmwarefusion.box"
+# Default env properties which can be overridden
+# Example override: echo "ENV['PASSENGER_PATH_URI'] ||= '../../phusion/passenger-docker' # " >> ~/.vagrant.d/Vagrantfile
+BASE_BOX_URL       = ENV['BASE_BOX_URL'      ] || 'https://oss-binaries.phusionpassenger.com/vagrant/boxes/'
+VAGRANT_BOX_URL    = ENV['VAGRANT_BOX_URL'   ] || BASE_BOX_URL + 'ubuntu-12.04.3-amd64-vbox.box'
+VMWARE_BOX_URL     = ENV['VMWARE_BOX_URL'    ] || BASE_BOX_URL + 'ubuntu-12.04.3-amd64-vmwarefusion.box'
+PASSENGER_PATH_URI = ENV['PASSENGER_PATH_URI'] || '../passenger-docker'
 
 $script = <<SCRIPT
 wget -q -O - https://get.docker.io/gpg | apt-key add -
@@ -23,9 +26,9 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   config.vm.box = 'phusion-open-ubuntu-12.04-amd64'
   config.vm.box_url = VAGRANT_BOX_URL
   config.ssh.forward_agent = true
-  passenger_path = "#{ROOT}/../passenger-docker"
+  passenger_path = "#{ROOT}/#{PASSENGER_PATH_URI}"
   if File.directory?(passenger_path)
-    config.vm.synced_folder File.expand_path(passenger_path), "/vagrant/passenger-docker"
+    config.vm.synced_folder File.expand_path(passenger_path), '/vagrant/passenger-docker'
   end
 
   config.vm.provider :vmware_fusion do |f, override|