The files to recreate issue.

minion

file_client: local

file_roots:
    base:
        - /srv/salt/states

pip.sls

pip_pkgs:
  pip.installed:
    - name: ''
    - runas: ubuntu
    - requirements: salt://requirements.txt
    - bin_env: /home/ubuntu/virtualenv
    - cwd: /home/ubuntu
    - require:
      - virtualenv: /home/ubuntu/virtualenv

requirements.txt

Django==1.5.1
wsgiref==0.1.2
uWSGI==1.9.14

top.sls

base:
  '*':
    - pip
    - virtualenv

virtualenv.sls

virtualenv_reqs:
  pkg.installed:
    - pkgs:
      - python3
      - python3-dev
      # the package uses python 2.7.3, but we can bootstrap with python3
      - python-virtualenv

/home/ubuntu/virtualenv:
  virtualenv.managed:
    - system_site_packages: False
    - python: /usr/bin/python3
    - runas: ubuntu
    - require:
      - pkg.installed: virtualenv_reqs