2.0.1 failed with stable lxml and 2.1.1 tested OK.
Package-Manager: Portage-2.3.8, Repoman-2.3.3
dev-python/pillow[${PYTHON_USEDEP}]
dev-python/cloudpickle[${PYTHON_USEDEP}]
assets? ( >=dev-python/webassets-0.10.1[${PYTHON_USEDEP}] )
- charts? ( ~dev-python/pygal-2.0.1[${PYTHON_USEDEP}] )
+ charts? ( >=dev-python/pygal-2.0.1[${PYTHON_USEDEP}] )
ghpages? ( >=dev-python/ghp-import-0.4.1[${PYTHON_USEDEP}] )
hyphenation? ( >=dev-python/pyphen-0.9.1[${PYTHON_USEDEP}] )
ipython? ( >=dev-python/ipython-2.0.0[notebook,${PYTHON_USEDEP}] )