Add the basebox as a Git submodule to your project from the root of your project:

git submodule add dev/basebox

Note: You may use a custom path to check it out to, but this value must also be set accordingly in Vagrantfile.local (parameter: $basebox_path)

Once the basebox has been added as a submodule to your project, it should pull in its own dependencies. To do so, instruct git to update in the submodules:

git submodule sync && git submodule update --init --recursive

Once this has been completed you have the basebox and its dependencies and can proceed with the configuration.