Traceback (most recent call last):
  File ".bootstrap/_pex/pex.py", line 328, in execute
  File ".bootstrap/_pex/pex.py", line 260, in _wrap_coverage
  File ".bootstrap/_pex/pex.py", line 292, in _wrap_profiling
  File ".bootstrap/_pex/pex.py", line 371, in _execute
  File ".bootstrap/_pex/pex.py", line 429, in execute_entry
  File ".bootstrap/_pex/pex.py", line 434, in execute_module
  File "/usr/lib/python2.7/runpy.py", line 180, in run_module
    fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/nonexistent/.pex/install/pex_wrapper-0.0.0-py2.7.egg.355ab1e4a2649222db04cd7b5a7f2a400079ce2a/pex_wrapper-0.0.0-py2.7.egg/pex_wrapper.py", line 256, in <module>
    sys.exit(main())
  File "/nonexistent/.pex/install/pex_wrapper-0.0.0-py2.7.egg.355ab1e4a2649222db04cd7b5a7f2a400079ce2a/pex_wrapper-0.0.0-py2.7.egg/pex_wrapper.py", line 253, in main
    pex_builder.build(output)
  File "/nonexistent/.pex/install/pex-1.1.11-py2.py3-none-any.whl.abc7d0c18b74b47118dd27e85e69b2bc3dd9b36d/pex-1.1.11-py2.py3-none-any.whl/pex/pex_builder.py", line 424, in build
    self.freeze(bytecode_compile=bytecode_compile)
  File "/nonexistent/.pex/install/pex-1.1.11-py2.py3-none-any.whl.abc7d0c18b74b47118dd27e85e69b2bc3dd9b36d/pex-1.1.11-py2.py3-none-any.whl/pex/pex_builder.py", line 411, in freeze
    self._precompile_source()
  File "/nonexistent/.pex/install/pex-1.1.11-py2.py3-none-any.whl.abc7d0c18b74b47118dd27e85e69b2bc3dd9b36d/pex-1.1.11-py2.py3-none-any.whl/pex/pex_builder.py", line 335, in _precompile_source
    compiled_relpaths = compiler.compile(self._chroot.path(), source_relpaths)
  File "/nonexistent/.pex/install/pex-1.1.11-py2.py3-none-any.whl.abc7d0c18b74b47118dd27e85e69b2bc3dd9b36d/pex-1.1.11-py2.py3-none-any.whl/pex/compiler.py", line 86, in compile
    stderr=subprocess.PIPE)
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 13] Permission denied