Don't preserve modified time when untarring files [GH-1539]

CHANGELOG.md

@@ -31,6 +31,7 @@ IMPROVEMENTS:
 BUG FIXES:
 
   - The `:mac` option for host-only networks is respected. [GH-1536]
+  - Don't preserve modified time when untarring boxes. [GH-1539]
 
 ## 1.1.6 (April 3, 2013)
 

lib/vagrant/box_collection.rb

@@ -101,7 +101,7 @@ module Vagrant
       # Extract the box into a temporary directory.
       @logger.debug("Unpacking box into temporary directory: #{temp_dir}")
       result = Util::Subprocess.execute(
-        "bsdtar", "-v", "-x", "-C", temp_dir.to_s, "-f", path.to_s)
+        "bsdtar", "-v", "-x", "-m", "-C", temp_dir.to_s, "-f", path.to_s)
       raise Errors::BoxUnpackageFailure, :output => result.stderr.to_s if result.exit_code != 0
 
       # If we get a V1 box, we want to update it in place