six
compatibleversion>=0.1.2

[:platform_system == "Windows"]
defusedxml
pypiwin32

[:python_version < "2.7"]
backoff<1.7
click<7
PyYAML<4
wheel<=0.29.0

[:python_version < "3"]
futures

[:python_version < "3.5"]
PyYAML<=5.2

[:python_version <= "3.4"]
backoff<=1.8.0

[:python_version > "3.4"]
backoff

[:python_version >= "2.7"]
click

[:python_version >= "3.5"]
PyYAML
