output van vagrant up

gistfile1.txt

vuokko@Nemesis:~/netwerken/labo7/sneakers$ vagrant up dashing
Bringing machine 'dashing' up with 'virtualbox' provider...
[dashing] Box 'sneakers-6.0.7-ruby193-20130911' was not found. Fetching box from specified URL for
the provider 'virtualbox'. Note that if the URL does not have
a box for this provider, you should interrupt Vagrant now and add
the box yourself. Otherwise Vagrant will attempt to download the
full box prior to discovering this error.
Downloading or copying the box...
An error occurred while downloading the remote file. The error
message, if any, is reproduced below. Please fix this error and try
again.

The requested URL returned error: 404 Not Found