Dear users I want to install z2pack code ,following error occurred at the end of installation.

no previously-included directories found matching 'doc' Downloading/unpacking fsc.export (from z2pack) Downloading fsc.export-1.1.0.tar.gz Running setup.py (path:/tmp/pip_build_aamiraslam/fsc.export/setup.py) egg_info for package fsc.export error in fsc.export setup command: Invalid environment marker: python_version < "3" Complete output from command python setup.py egg_info: error in fsc.export setup command: Invalid environment marker: python_version < "3"

---------------------------------------- Cleaning up... Command python setup.py egg_info failed with error code 1 in /tmp/pip_build_aamiraslam/fsc.export Storing debug log for failure in /home/aamiraslam/.pip/pip.log

-- Best Regards Abdul Jalil PhD Student Department of Material Science & Engineering University of Science and Technology