--ram option throws a NameError

# vm_builder.rb -r 2
/usr/bin/vm_builder.rb:35: undefined local variable or method `optoons' for main:Object (NameError)
	from /usr/lib/ruby/1.8/optparse.rb:1298:in `call'
	from /usr/lib/ruby/1.8/optparse.rb:1298:in `parse_in_order'
	from /usr/lib/ruby/1.8/optparse.rb:1254:in `catch'
	from /usr/lib/ruby/1.8/optparse.rb:1254:in `parse_in_order'
	from /usr/lib/ruby/1.8/optparse.rb:1248:in `order!'
	from /usr/lib/ruby/1.8/optparse.rb:1339:in `permute!'
	from /usr/lib/ruby/1.8/optparse.rb:1360:in `parse!'
	from /usr/bin/vm_builder.rb:20