managing multiple versions of a config per role or nodegroup

Failure on Box 1

FreeBSD-01:
    Data failed to compile:
----------
    Rendering SLS config failed, render error: Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/salt/utils/templates.py", line 63, in render_tmpl
    output = render_str(tmplstr, context, tmplpath)
  File "/usr/local/lib/python2.7/site-packages/salt/utils/templates.py", line 116, in render_jinja_tmpl
    output = jinja_env.from_string(tmplstr).render(**context)
  File "/usr/local/lib/python2.7/site-packages/Jinja2-2.7-py2.7.egg/jinja2/environment.py", line 969, in render
    return self.environment.handle_exception(exc_info, True)
  File "/usr/local/lib/python2.7/site-packages/Jinja2-2.7-py2.7.egg/jinja2/environment.py", line 742, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "<template>", line 8, in top-level template code
UndefinedError: 'dict object' has no attribute 'roles'

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/salt/state.py", line 1877, in render_state
    rendered_sls=mods
  File "/usr/local/lib/python2.7/site-packages/salt/template.py", line 68, in compile_template
    ret = render(input_data, env, sls, **render_kwargs)
  File "/usr/local/lib/python2.7/site-packages/salt/renderers/jinja.py", line 41, in render
    tmp_data.get('data', 'Unknown render error in jinja renderer')
SaltRenderError: Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/salt/utils/templates.py", line 63, in render_tmpl
    output = render_str(tmplstr, context, tmplpath)
  File "/usr/local/lib/python2.7/site-packages/salt/utils/templates.py", line 116, in render_jinja_tmpl
    output = jinja_env.from_string(tmplstr).render(**context)
  File "/usr/local/lib/python2.7/site-packages/Jinja2-2.7-py2.7.egg/jinja2/environment.py", line 969, in render
    return self.environment.handle_exception(exc_info, True)
  File "/usr/local/lib/python2.7/site-packages/Jinja2-2.7-py2.7.egg/jinja2/environment.py", line 742, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "<template>", line 8, in top-level template code
UndefinedError: 'dict object' has no attribute 'roles'

Test config.sls

### configs
/usr/local/etc/pkg.conf:
  file:
    - managed
    - source:
      - salt://configs/{{ grains['roles'] }}-pkg.conf
      - salt://configs/pkg.conf
    - user: root
    - group: wheel
    - mode: 644
    - require:
      - pkg: pkg

pkg:
  pkg:
    - installed

{{ salt['grains.get']('nodename', 'default value') }}