Build doesn't take my alternate layouts

[Mathieu Vo-Quang]

Hi all,
In my config.rb file, I have the following:
page "/en/*", :layout => :layout_en

So every page within the /en/ directory uses a different layout,
layout_en.html, than the default layout.haml

Everything works fine when previewing, but when I build my project,
all generated files use the alternate layout only.

I've tried
page "/en/*", :layout => :layout_en
and
page "/en/*", :layout => "layout_en"

Thanks
Matt