This ain't the tarball you're looking for.

The file you're trying to download was linked in a specific context that your
HTTP client is attempting to elide. To download the file, please set the HTTP
referer field to the expected value -- you should know what that is if you know
where the file was linked initially.

For further details, see also:

If you're still having problems, feel free to contact spyked on Freenode, in
#trilema or #spyked.