diff --git a/Vagrantfile b/Vagrantfile
index 7d7f5bf..602026b 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -6,4 +6,5 @@ VAGRANTFILE_API_VERSION = "2"
 Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   config.vm.box = "bento/ubuntu-17.04"
   config.vm.synced_folder "./", "/home/vagrant/rucc"
+  config.vm.synced_folder "./thirdparty/ruby", "/home/vagrant/ruby"
 end