As of yesterday, cmake-utils.eclass dropped its base.eclass inherit in favor of inlining several functions. However, kensington noticed that several packages inheriting cmake-utils.eclass also call base.eclass functions directly without inheriting base.eclass explicitly. The ebuilds should be updated to inherit base.eclass. No talking here, please.
Note that cmake-utils exports src_prepare now, which people may wish to use instead of base.
Looks like that's everything.