06-Jul-2015 09:19:19	     [exec]   - Installing guzzlehttp/promises (1.0.1)
06-Jul-2015 09:19:19	     [exec]     Downloading: Connecting...    Failed to download guzzlehttp/promises from dist: Could not authenticate against github.com
06-Jul-2015 09:19:19	     [exec]     Now trying to download from source
06-Jul-2015 09:19:19	     [exec]   - Installing guzzlehttp/promises (1.0.1)
06-Jul-2015 09:19:19	     [exec]     Cloning 2ee5bc7f1a92efecc90da7f6711a53a7be26b5b7