diff --git a/lib/ember-cli-rails.rb b/lib/ember-cli-rails.rb
index fb279bcf..e00166aa 100644
--- a/lib/ember-cli-rails.rb
+++ b/lib/ember-cli-rails.rb
@@ -1,3 +1,4 @@
+require 'fileutils'
 require "ember_cli/engine" if defined?(Rails)
 require "ember_cli/errors"
 
@@ -65,7 +66,9 @@ def env
   private
 
   def cleanup
-    previous_builds.each(&:rmtree)
+    previous_builds.each do |path|
+      FileUtils.rm_rf(path)
+    end
   end
 
   def previous_builds