kde-base/pykde4 ebuilds contain calls to undefined base_src_install_docs(). $ grep base_src_install_docs *.ebuild pykde4-4.11.2-r1.ebuild: base_src_install_docs pykde4-4.11.5.ebuild: base_src_install_docs pykde4-4.12.2.ebuild: base_src_install_docs $ portageq metadata / ebuild kde-base/pykde4-4.12.2::gentoo INHERITED 2>/dev/null versionator toolchain-funcs kde4-base fdo-mime flag-o-matic eutils gnome2-utils multiprocessing portability cmake-utils multilib virtualx python-r1 multibuild kde4-functions python-utils-r1 cmake-utils.eclass since r1.97 has code of base_src_install_docs() inside enable_cmake-utils_src_install(), so calls to base_src_install_docs() in kde-base/pykde4 probably should be deleted.
Thanks for the report, fixed by changing to einstalldocs.