Download issues with drush - "bootstrap_business: failed to open stream: No such file or directory"

I'm getting the below error on Mac Os using latest composer version of drush "Drush Version : 7.0-dev".

It may be due to your project folder being named with a dash instead of an underscore "bootstrap-business".

drush dl --select bootstrap_business
Choose one of the available releases for bootstrap_business:
 [0]  :  Cancel
 [1]  :  8.x-1.0-alpha1  -  2014-Jun-02  -  Supported
1
copy(/tmp/drush_tmp_1417616101_547f1ae5a3e97/bootstrap_business): failed to open stream: No such file or     [warning]
directory filesystem.inc:267
Project bootstrap_business (8.x-1.0-alpha1) could not be downloaded to                                       [error]
/Applications/MAMP/htdocs/local.paulmccrodden.com//themes/bootstrap_business.