[boost] Whatever happend to migrating to CMake?

Somme time ago there seemed to be a serious effort to migrate Boost's build system to CMake. While the documentation to this effort is still around, it seems like the most recent activity dates to 2013. I tried cloning the git repository at git clone http://github.com/boost-lib/boost.git modules, but it seems to be in an invalid state. Whatever happned to this project? Was a decision made to stick to Boost.Build, or did the project peter out due to a lack of resources? Is there interest in resurrecting the project?