laravel/homestead — pull request #111 by anfrantic (2014-11-18 18:42:18+00:00)
Title: Windows machines homstead_path()

$_SERVER['HOME'] is not defined in windows hosts
Instead we have to use $_SERVER['HOMEPATH'] and $_SERVER['HOMEDRIVE']
Another way is to manually add system environment variable 'HOME' but i think this should be mentioned in the docs