sshkit within not applied to non-mapped commands

gistfile1.txt

require 'sshkit'
require 'sshkit/dsl'

on 'example.com', user: 'matt' do 
  within('current') do 
    puts "this works as expected:"
    puts capture :ls
    puts "this does not get executed in the 'current' directory:"
    puts capture 'ls -l'
  end
end