ndn-simple-mpi.cpp compilation fails because NS3_MPI not enabled

[bbhopesh]

I compiled ns3 with MPI enabled. I can run ndn-simple-mpi from original installation directory of ns3 and ndnSIM. Now I am trying to run the same scenario by placing it under scenarios directory of this template repository but it is failing with the following error.

[1/2] Compiling scenarios/ndn-simple-mpi.cpp
../scenarios/ndn-simple-mpi.cpp:31:2: error: #error "ndn-simple-mpi scenario can be compiled only if NS3_MPI is enabled"
 #error "ndn-simple-mpi scenario can be compiled only if NS3_MPI is enabled"
  ^~~~~

I took all the steps for installation and ran sudo ./waf install after compiling ns3 and ndnSIM. I could run other non mpi examples by placing them under this repo. Can you please suggest on what could be going wrong?