diff --git a/Library/Homebrew/cmd/unpack.rb b/Library/Homebrew/cmd/unpack.rb
index 3a0630d6aa..68b81bd2f4 100644
--- a/Library/Homebrew/cmd/unpack.rb
+++ b/Library/Homebrew/cmd/unpack.rb
@@ -28,7 +28,7 @@ module Homebrew
       ENV["VERBOSE"] = "1" # show messages about tar
       f.brew do
         f.patch if ARGV.flag?("--patch")
-        cp_r getwd, stage_dir
+        cp_r getwd, stage_dir, :preserve => true
       end
       ENV["VERBOSE"] = nil