```$ ./pants --python-setup-interpreter-requiremen...
# generalw
witty-crayon-22786
10/03/2017, 4:31 PM Copy code
$ ./pants --python-setup-interpreter-requirement='CPython>=2.7,<3' help
# nada
$ PANTS_PYTHON_SETUP_INTERPRETER_REQUIREMENT='CPython>=2.7,<3' ./pants help
Pants 1.4.0.dev8+3831229698
...