From: Antonio Terceiro <terceiro@debian.org>
Date: Sat, 11 Oct 2014 16:55:21 -0300
Subject: Read data from /usr/share/vagrant

---
 lib/vagrant/shared_helpers.rb | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/vagrant/shared_helpers.rb b/lib/vagrant/shared_helpers.rb
index c2c52ae..8938867 100644
--- a/lib/vagrant/shared_helpers.rb
+++ b/lib/vagrant/shared_helpers.rb
@@ -65,7 +65,17 @@ module Vagrant
   #
   # @return [Pathname]
   def self.source_root
-    @source_root ||= Pathname.new(File.expand_path('../../../', __FILE__))
+    @source_root ||=
+      begin
+        source = Pathname.new(File.expand_path('../../../', __FILE__))
+        if source.join('debian/control').exist?
+          # working inside source package
+          source
+        else
+          # installed
+          Pathname.new('/usr/share/vagrant')
+        end
+      end
   end
 
   # This returns the path to the ~/.vagrant.d folder where Vagrant's