*vc-diff*.diff

diff --git a/Vagrantfile b/Vagrantfile
index 991c867..6b71d0c 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -14,6 +14,12 @@ Vagrant.configure(2) do |config|
   # boxes at https://atlas.hashicorp.com/search.
   config.vm.box = "ubuntu/trusty64"
 
+  if Vagrant.has_plugin?("vagrant-cachier")
+    # Configure cached packages to be shared between instances of the same base
+    # box. More info on http://fgrehm.viewdocs.io/vagrant-cachier/usage
+    config.cache.scope = :box
+  end
+
   # Disable automatic box update checking. If you disable this, then
   # boxes will only be checked for updates when the user runs
   # `vagrant box outdated`. This is not recommended.