put virtualenv activation during build in comment. That means that for the moment the build machine must be provisionned beforehand, or ansible must be available globally
require 'rubygems'
require 'bundler/setup'
Bundler.require :default
require 'rspec/core/rake_task'
require 'puppetlabs_spec_helper/rake_tasks'
require 'rspec-system/rake_task'
task :default do
sh %{rake -T}
end