Add the dependency to haml-edge back.

Rakefile

@@ -45,6 +45,7 @@ begin
     gemspec.description = "Compass is a Sass-based Stylesheet Framework that streamlines the creation and maintainance of CSS."
     gemspec.authors = ["Chris Eppstein"]
     gemspec.has_rdoc = false
+    gemspec.add_dependency('haml-edge', '>= 2.1.12')
   end
 rescue LoadError
   puts "Jeweler not available. Install it with: sudo gem install technicalpickles-jeweler -s http://gems.github.com"