digital ocean vagrantfile that hangs on vagrant destroy

Vagrantfile

Vagrant.configure('2') do |config|
  config.vm.box = "digital_ocean"
  config.ssh.private_key_path = ENV['VAGRANT_KEY_PATH']

  config.hostmanager.enabled = false

  config.vm.provider :digital_ocean do |provider|
    provider.image = 'Ubuntu 13.10 x64'
    provider.region = 'New York 1'
    provider.size = '1GB'
    provider.client_id = ENV['CLIENT_ID']
    provider.api_key = ENV['API_KEY']
    provider.ca_path = ENV['SSL_CERT_FILE']
  end
  config.vm.provision :shell, :inline => "ln -sf /usr/share/zoneinfo/America/Los_Angeles /etc/localtime"

  config.vm.define "master" do |master|
    master.vm.provider :digital_ocean do |provider|
      provider.size = '1GB'
    end
  end
end