The distributed tarball has a requirements.txt file listing: sphinx>=1.1 so I expect the ebuild should have: RDEPEND="dev-python/sphinx[${PYTHON_USEDEP}]" Reproducible: Always There are no actual Sphinx imports in the sphinx_rtd_theme package, but I think an RDEPEND makes sense to record the version compatibility and mirror the upstream packaging.
Created attachment 384134 [details] emerge --info
04 Sep 2014; Ian Delaney <idella4@gentoo.org> sphinx_rtd_theme-0.1.6.ebuild: added missing RDEP, fixes Bug 521998 by W.T. King