cygwin - drush bundler issue

user@PC /cygdrive/c/xampp/htdocs/projects/proj1/sites/all/themes/theme_v01
$ drush omega-guard
Which theme do you want to run Guard for?
 [0]  :  Cancel
 [1]  :  Ohm (Subtheme of Omega) - Omega based demonstration theme. Serves as a best-practice reference for the
         Omega documentation. Ohm will be constantly updated as best practice evolves so shouldn't be used in
         production.
 [2]  :  Omega - A powerful HTML5 base theme framework utilizing tools like Sass, Compass, Grunt, Bower, Ruby
         Version Manager, Bundler and more.
 [3]  :  Theme v01 (Subtheme of Omega) - Please provide a description for your theme.

3
You have to install Bundler version 1.2 or newer.                                                      [error]

user@PC /cygdrive/c/xampp/htdocs/projects/proj1/sites/all/themes/theme_v01
$ bundler -v
Bundler version 1.8.4

user@PC /cygdrive/c/xampp/htdocs/projects/proj1/sites/all/themes/theme_v01
$