MPQC does not support multiprocessor support?

Binary package hint: mpqc

$ export MESSAGEGRP='<MPIMessageGrp>:(n=2)'
$ mpqc water.inp
ClassDesc::load_class looking for "./classes"
ClassDesc::load_class("MPIMessageGrp"): load failed
Either "MPIMessageGrp" is an invalid class name or the code
for "MPIMessageGrp" was not linked into the executable.
Segmentation fault

Looking at the dependencies, MPI indeed does not seem to be used, which makes a 'Massively Parallel Quantum Chemistry' program rather featureless :(

It seems to apply to Debian testing/unstable too, though at least debian has (had) MPI support. What is the reason that MPI support is not available?

Egon

dpkg -l "*mpqc*"

Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-=======================================-=======================================-==============================================================================================
ii mpqc 2.3.1-1 The Massively Parallel Quantum Chemistry Program
ii mpqc-support 2.3.1-1 Support programs and tools for MPQC