here’s the options hash it’s getting:

{
  'use_wheel': True,
  'inherit_path': False,
  'script': None,
  'python': None,
  'repos': [PyPIFetcher('<https://pypi.python.org/simple/>')],
  'pex_name': None,
  'pypi': True,
  'requirement_files': [],
  'platform': 'linux-x86_64',
  'cache_dir’: '.pex/build',
  'entry_point': 'examples.foo',
  'verbosity': 0,
  'pex_root’: '.pex',
  'zip_safe': True,
  'interpreter_cache_dir': '.pex/interpreters',
  'ignore_errors': False,
  'cache_ttl': None,
  'python_shebang': None,
  'always_write_cache': False,
  'find_links': ''
}