id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	launchpad_bug
3271	CircleCI image builders with pip older than 9 fail because of setuptools incompatiblity	exarkun	exarkun	"setuptools 45 has been released and only supports Python 3.5 and newer.  It seems to come with a `python_requires` declaration announcing this.  pip older than 9 fails to successfully interpret `python_requires` declarations, though, resulting in a Python 3-only setuptools being installed.  Then, everything is broken because setuptools is incompatible with the version of Python in use.

See also https://github.com/pypa/setuptools/issues/1964
"	defect	closed	supercritical	undecided	dev-infrastructure	n/a	fixed	review