Installing ruby193 on ubuntu precise

ruby193.sls

rubyppa:
  pkgrepo.managed:
    - name: deb http://ppa.launchpad.net/brightbox/ruby-ng/ubuntu precise main
    - ppa: brightbox/ruby-ng
    - file: /etc/apt/sources.list.d/ruby-ng-precise.list

ruby1.9.3:
  pkg.installed:
    - require:
        - pkgrepo: rubyppa

ruby_alternative:
    alternatives.install:
        - name: ruby
        - link: /usr/bin/ruby
        - path: /usr/bin/ruby1.9.3
        - priority: 10
        - require:
            - pkg: ruby1.9.3

gem_alternative:
    alternatives.install:
        - name: gem
        - link: /usr/bin/gem
        - path: /usr/bin/gem1.9.3
        - priority: 10
        - require:
            - pkg: ruby1.9.3