railsapps - Using Rails Composer, getting error "-bash: rails: command not found" using "learn-rails" gemset -

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i'm using nitrous on windows 7, , trying use railscomposer following "build ‘learn rails’ in less 5 minutes" of learn ruby on rails book.

the book tells:

use “learn-rails” gemset created earlier:

$ rvm use ruby-2.1.3@learn-rails

and then,

$ rails new foobar-kadigan -m https://raw.github.com/railsapps/rails-composer/master/composer.rb

i have error:

-bash: rails: command not found


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