def have_environment_marker_support():
"""
Check whether setuptools has support for PEP-426 environment marker support.
Based on the ``setup.py`` script of the ``pytest`` package:
https://bitbucket.org/pytest-dev/pytest/src/default/setup.py
"""
try:
from pkg_resources import parse_version
from setuptools import __version__
return parse_version(__version__) >= parse_version('0.7.2')
except Exception:
return False
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