title: Docker - unable to prepare context: unable to evaluate symlinks in Dockerfile path: GetFileAttributesEx
body: <p>I just downloaded Docker Toolbox for Windows 10 64bit today.  I'm going through the tutorial.  I'm receving the following error when trying to build an image using a Dockerfile.</p>
  <p>Steps:</p>
  <ul>
  <li>Launched Docker Quickstart terminal.</li>
  <li>testdocker after creating it.</li>
  <li>Prepare Dockerfile as documented in &quot;Build your own image&quot; web link</li>
  <li>ran below command</li>
  </ul>
  <p><code>    docker build -t docker-whale .</code></p>
  <p><code>Error: $ docker build -t docker-whale .</code></p>
  <p><code>unable to prepare context: unable to evaluate symlinks in Dockerfile path: GetFileAttributesEx C:\Users\Villanueva\Test\testdocker\Dockerfile: The system cannot find the file specified.</code></p>
  <p><strong>BTW:</strong> I tried several options mentioned @ <a href="https://github.com/docker/docker/issues/14339" rel="noreferrer">https://github.com/docker/docker/issues/14339</a></p>
  <pre><code>    $ docker info
      Containers: 4
       Running: 0
       Paused: 0
       Stopped: 4
      Images: 2
      Server Version: 1.10.1
      Storage Driver: aufs
       Root Dir: /mnt/sda1/var/lib/docker/aufs
       Backing Filesystem: extfs
       Dirs: 20
       Dirperm1 Supported: true
      Execution Driver: native-0.2
      Logging Driver: json-file
      Plugins:
       Volume: local
       Network: bridge null host
      Kernel Version: 4.1.17-boot2docker
      Operating System: Boot2Docker 1.10.1 (TCL 6.4.1); master : b03e158 - Thu Feb 11 22:34:01 UTC 2016
      OSType: linux
      Architecture: x86_64
      CPUs: 1
      Total Memory: 996.2 MiB
      Name: default
      ID: C7DS:CIAJ:FTSN:PCGD:ZW25:MQNG:H3HK:KRJL:G6FC:VPRW:SEWW:KP7B
      Debug mode (server): true
       File Descriptors: 32
       Goroutines: 44
       System Time: 2016-02-19T17:37:37.706076803Z
       EventsListeners: 0
       Init SHA1:
       Init Path: /usr/local/bin/docker
       Docker Root Dir: /mnt/sda1/var/lib/docker
      Labels:
       provider=virtualbox
  </code></pre>
  <p>Thanks.</p>