```ruby
cask :v1 => 'handbrakecli-nightly' do
  version '6945svn'
  sha256 '303289b4ed14f9053d1ccaf01bd440d33418a8303cdf9c69e0116d45cec5b9e3'

  url "http://download.handbrake.fr/nightly/HandBrake-#{version}-MacOSX.6_CLI_x86_64.dmg"
  homepage 'http://handbrake.fr'
  license :gpl

  binary 'HandBrakeCLI'

  depends_on :macos => '>= :snow_leopard'
end
```

Update HandbrakeCLI Nightly to v6985svn
user
```ruby
cask :v1 => 'handbrakecli-nightly' do
  version '6985svn'
  sha256 'c2dd1a1c94dff36b74bbabea48d0361666208b94b305aa0e9b87aa182b6af989'

  url "http://download.handbrake.fr/nightly/HandBrake-#{version}-MacOSX.6_CLI_x86_64.dmg"
  homepage 'http://handbrake.fr'
  license :gpl

  binary 'HandBrakeCLI'

  depends_on :macos => '>= :snow_leopard'
end
```
assistant