From 4a8632e54d02b8c71ab581f18287a682e1640bcc Mon Sep 17 00:00:00 2001
From: Xu Cheng <xucheng@me.com>
Date: Thu, 14 Jan 2016 20:42:37 +0800
Subject: [PATCH] unpack: preserve file attributes like mtime

Closes Homebrew/homebrew#48068.

Signed-off-by: Xu Cheng <xucheng@me.com>
---
 Library/Homebrew/cmd/unpack.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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