```ruby
cask :v1 => '0ad' do
  version '0.0.17-alpha'
  sha256 '7493a8775946f56482939ee51d96ae41a7a8e114ccf050e1406ff4ebf5cb6a7f'

  # wildfiregames.com is the official download host per the vendor homepage
  url "http://releases.wildfiregames.com/0ad-#{version}-osx64.dmg"
  name '0 A.D.'
  homepage 'http://www.play0ad.com/'
  license :unknown    # todo: change license and remove this comment; ':unknown' is a machine-generated placeholder

  app '0ad.app'
end
```

Include license information for 0AD.
user
```ruby
cask :v1 => '0ad' do
  version '0.0.17-alpha'
  sha256 '7493a8775946f56482939ee51d96ae41a7a8e114ccf050e1406ff4ebf5cb6a7f'

  # wildfiregames.com is the official download host per the vendor homepage
  url "http://releases.wildfiregames.com/0ad-#{version}-osx64.dmg"
  name '0 A.D.'
  homepage 'http://www.play0ad.com/'
  license :oss

  app '0ad.app'
end
```
assistant