Backport a fix for older versions of Python
Backport a fix for older versions of Python
pathlib2>=2.3.5;python_version<"3.5"
This will fix the following issue on systems running an older version of Python:
error: pathlib2 2.3.2 is installed but pathlib2<3,>=2.3.3; python_version < "3.4" and sys_platform != "win32" is required by set(['virtualenv'])