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
fixtures:
repositories:
"concat": "git://github.com/puppetlabs/puppetlabs-concat.git"
"stdlib": "git://github.com/puppetlabs/puppetlabs-stdlib.git"
symlinks:
"puppi": "#{source_dir}"