$ vpkg_versions python-mpi4py
Available versions in package (* = default version):

[/opt/shared/valet/2.0.1/etc/python-mpi4py.vpkg_json]
python-mpi4py        Fundamental library for scientific computing
* 1.3.1-python2.7.8  Version 1.3.1 and python 2.7.8
  1.3.1-python3.2.5  Version 1.3.1 and python 3.2.5
  3.0.3-python3.6.3  Version 3.0.3 and python 3.6.3
  python2.7.8        alias to python-mpi4py/1.3.1-python2.7.8
  python3.2.5        alias to python-mpi4py/1.3.1-python3.2.5
  python3.6.3        alias to python-mpi4py/3.0.3-python3.6.3