scaml “illegal nesting” error

Question

Hi I'm a total Noob at scalate/scaml (I tagged haml since scaml & haml are similar). I have some template that looks like this:

-@ var customer : com.x.model.Customer
!!!
%html
    %body
        %p Contact:
            %a{:href => 'mailto:#{customer.email}'}=customer.contact

The %p line is flagged with this error:

org.fusesource.scalate.InvalidSyntaxException: Illegal nesting: content can't be given on the same line as html element or nested within it if the tag is closed at 16.17