> (dev-python/certifi-2018.4.16:0/0::gentoo, ebuild scheduled for merge) conflicts with
>=dev-python/certifi-2016.9.26[python_targets_python2_7(-),python_targets_python3_6(-),-python_single_target_pypy(-),-python_single_target_pypy3(-),-python_single_target_python2_7(-),-python_single_target_python3_4(-),-...3_7(-)] required by (dev-python/setuptools-40.0.0:0/0::gentoo, installed)
これ2016.9.26以降のdev-python/certifiがあれば良いのだから条件を満たしていそうなのに通らなくてないています