Rakefile in annoy-rb-0.2.3 vs Rakefile in annoy-rb-0.3.0

@@ -5,10 +5,11 @@
 
 require 'rake/extensiontask'
 
 task :build => :compile
 
-Rake::ExtensionTask.new('annoy') do |ext|
+Rake::ExtensionTask.new('annoyext') do |ext|
+  ext.ext_dir = 'ext/annoy'
   ext.lib_dir = 'lib/annoy'
 end
 
 task :default => [:clobber, :compile, :spec]