Use rule Ace::Static(output_path), file if you need to specify output_path.

Example: rule Ace::Static("output/index.html"), "index.html.haml"

lib/ace/static.rb

@@ -3,7 +3,16 @@
 require "ace/filters/template"
 
 # rule Ace::Static, "about.html.haml"
+# rule Ace::Static("output/index.html"), "index.html.haml"
 module Ace
+  def self.Static(output_path)
+    Class.new(Static) do
+      define_method(:output_path) do
+        output_path
+      end
+    end
+  end
+
   class Static < Item
     before Ace::TemplateFilter
   end