title: vagrant up command fails
body: <p>I am learning to use vagrant and I have recently a setup vagrant homestead system on my local machine. </p>
  
  <p>my <code>homestead.yaml</code> is in <code>scr/stubs/</code> folder.</p>
  
  <p>It looks like this.</p>
  
  <pre><code>ip: "192.168.10.10"
  memory: 2048
  cpus: 1
  
  authorize: /var/www/myhomestead/homestead/ssh/id_rsa.pub
  
  keys:
      - /var/www/myhomestead/homestead/ssh/id_rsa
  
  folders:
      - map: /var/www/sites/
        to: /home/vagrant/sites/
  
  sites:
      - map: homestead.app
        to: /home/vagrant/Code/Laravel/public
  
  databases:
      - homestead
  
  variables:
      - key: APP_ENV
        value: local
  </code></pre>
  
  <p>When I run "vagrant up" it gives me errors like this. </p>
  
  <blockquote>
    <p>amit@Amit:/var/www/myhomestead/homestead$ vagrant up</p>
    
    <p>Bringing machine 'default' up with 'virtualbox' provider...
    ==> default: Box 'base' could not be found. Attempting to find and install...
        default: Box Provider: virtualbox
        default: Box Version: >= 0
    ==> default: Adding box 'base' (v0) for provider: virtualbox
        default: Downloading: base
    An error occurred while downloading the remote file. The error
    message, if any, is reproduced below. Please fix this error and try
    again.</p>
    
    <p>Couldn't open file /var/www/myhomestead/homestead/base</p>
  </blockquote>