scikits_image should be bumped to a much newer version. If 0.13.0 remains it needs a new dependency <dev-python/numpy-1.16.0. See: https://github.com/numpy/numpy/issues/12744 https://github.com/scikit-image/scikit-image/issues/3649 Reproducible: Always
done, new package is in the tree https://gitweb.gentoo.org/repo/gentoo.git/tree/sci-libs/scikit-image/scikit-image-0.17.2.ebuild