--- a/lib/rails-assets-perfect-scrollbar.rb
+++ b/lib/rails-assets-perfect-scrollbar.rb
@@ -25,6 +25,7 @@
 
   if defined?(Rails)
     class Engine < ::Rails::Engine
+      config.root = '/usr/share/ruby-rails-assets-perfect-scrollbar'
       # Rails -> use app/assets directory.
     end
   end