"undefined" in final generator output

[alejandroiglesias]

The final output of the command reads:

Foundation theme "undefined" created. Now run:
1. undefined to install the required dependencies.
2. undefined to start modifying your theme.

Here is the full dump:

$ yo foundation

Which css preprocessing language would you prefer? stylus/sass (stylus) sass
Where would you want to place your static contents? (public) 
Where would you want to place your foundation sass files? (sass) 
   create public/css/normalize.css
   create public/index.html
   create public/javascripts/foundation/foundation.alerts.js
   create public/javascripts/foundation/foundation.clearing.js
   create public/javascripts/foundation/foundation.cookie.js
   create public/javascripts/foundation/foundation.dropdown.js
   create public/javascripts/foundation/foundation.forms.js
   create public/javascripts/foundation/foundation.joyride.js
   create public/javascripts/foundation/foundation.js
   create public/javascripts/foundation/foundation.magellan.js
   create public/javascripts/foundation/foundation.orbit.js
   create public/javascripts/foundation/foundation.placeholder.js
   create public/javascripts/foundation/foundation.reveal.js
   create public/javascripts/foundation/foundation.section.js
   create public/javascripts/foundation/foundation.tooltips.js
   create public/javascripts/foundation/foundation.topbar.js
   create public/javascripts/vendor/custom.modernizr.js
   create public/javascripts/vendor/jquery.js
   create public/javascripts/vendor/zepto.js
   create assets/favicon.ico
   create .gitignore
   create .jshintrc
   create Gruntfile.js
   create package.json
   create README.md

     info ... Fetching http://github.com/blai/foundation/archive/master.tar.gz ...
     info undefined
...........................................................................................................................................................................................................................................................................
✔ Done in 19.572s.
✔ Done in /Users/alejandro/.yeoman/cache/blai/foundation/master

   create sass/app.scss
   create sass/_variables.scss

Foundation theme "undefined" created. Now run:
1. undefined to install the required dependencies.
2. undefined to start modifying your theme.