[phenixbb] Phenix source code question

Hi, phenix.install provide an option of --source which will force the source code installation. However, I can't find the source directory in the downloaded package. More specifically, I was looking for the "extract_bond_params" subroutine under "cctbx_project/cctbx/geometry_restraints/". It was defined in "bond.h", and looks like its already been pre-compiled into the binary. So, is there any way I can recompile this C/C++ code? I have some limited knowledge of boost.python, and maybe thats why I didn't find the solution, but I appreciate for any quick instructions! Thanks! Best Regards, Hailiang