git diff refinerycms-images.rb 
diff --git a/refinerycms-images.rb b/refinerycms-images.rb
index 3fef0f7..e3d3caa 100644
--- a/refinerycms-images.rb
+++ b/refinerycms-images.rb
@@ -31,7 +31,9 @@ module Refinery
 
         app_images.define_macro(ActiveRecord::Base, :image_accessor)
         app_images.analyser.register(Dragonfly::Analysis::ImageMagickAnalyser)
-        app_images.analyser.register(Dragonfly::Analysis::FileCommandAnalyser) 
+        app_images.analyser.register(Dragonfly::Analysis::FileCommandAnalyser) do |a|
+          a.use_filesystem = true
+        end
 
         # This url_suffix makes it so that dragonfly urls work in traditional
         # situations where the filename and extension are required,