Render array passed from Express with Jade

Most of the questions pertaining to this all seem to be about passing the server-side JS object into a client-side JS object. Maybe I'm missing something, but all I want to do is render HTML using the server-side JS object.

On the server:

app.get '/', (req, res) ->

  res.render 'index',
    data:
      keywords: [
        'one'
        'two'
      ]

Using these docs, none of what's below works in the index.jade file:

- var keywords = [#{data.keywords}]
each kw in keywords
  li= kw

- var keywords = ["#{data.keywords}"]
each kw in keywords
  li= kw

- var keywords = "#{data.keywords}"
each kw in keywords
  li= kw

- var keywords = #{data.keywords}
each kw in keywords
  li= kw

The array does print to a string when I do:

p "#{data.keywords}"

Is this possible?