Vagrantfile

Vagrant.configure("2") do |config|
  config.vm.box = 'raring64'
  config.vm.box_url = 'https://dl.dropboxusercontent.com/u/3428571/raring64.box'
  config.vm.hostname = "pytell.local"

  config.vm.synced_folder "salt/", "/srv/salt" # Notice this difference

  $saltInstallScript = <<SCRIPT
  mkdir -p ~/tmp
  cd ~/tmp
  wget -O salt-bootstrap.sh http://bootstrap.saltstack.org
  sudo apt-get install python-software-properties -y
  sudo sh salt-bootstrap.sh -P

SCRIPT

  config.vm.provision :shell, :inline => $saltInstallScript, :args => ""


  config.vm.provision :salt do |s|
    s.minion_config = "salt/minion"
    s.verbose = true
    s.run_highstate = true
    s.bootstrap_options = "-P"
  end
end

Try changing line 20 to:

config.vm.provision "salt" do |s|