The second option is possible with my changes. Except it's even more explicit:

```ruby
Berkshelf.install # install using the default Berskfile
Berkshelf.install(berksfile: '/path/to/file', other_option: 'foo') # point to a specific Berskfile
```

I think the later is more explicit. Just my opinion. I'll un-deprecate if you want, but I'd really like you to consider it.