[boost] Boost.Build does not recognize .v2 less Jamfile s

I might have missed something in the Discussion, but isn't the v2 expected to work on Jamfile _and_ Jamfile.v2 ? If I actually rename the file Jamfile.v2 to Jamfile the build from boost root does not work anymore. Maybe a hint: the library does not show up in bjam --show-libraries. Thank you for attention, Roland