anytree
click>=7
packaging>=17
pkginfo>=1.4.2
setuptools>=38.3  # for pkg_resources
wheel
pip>=7.1.0,<21.1  # >=7.1.0 for --constraint, <21.1 for --use-deprecated legacy-resolver in pipgrip.pipper._get_available_versions https://github.com/pypa/pip/issues/9139#issuecomment-782084087
enum34; python_version=='2.7'
typing; python_version=='2.7'
