Hello Andreas,
Thanks, it solved build issue. I added tests for mb-mpi and at first I encountered this error:
--------------------------------------------------------------------------
The value of the MCA parameter "plm_rsh_agent" was set to a path
that could not be found:
plm_rsh_agent: ssh : rsh
Please either unset the parameter, or check that the path is correct
--------------------------------------------------------------------------
I googled this message and figured that this message suggests that ssh client is not installed.
So I added ssh to Depends in debian/control for mb-mpi and then it worked.
Regards, Nadiya