pipenv on top of python2 spack-created

[doutr...@llnl.gov]

I built a "root" python2 with spack (conataining pytorch, scipy, horoved, etc..)

Now I would like to create a virtual env on top of this

From a blank terminal (no spacktivate or anything) I get:

/usr/workspace/aml_user/vidya/ALE/blueos_3_ppc64le_ib_p9/kull.spack.env/kull.pytorch/.spack-env/view/bin/python2 -m virtualenv --system-site-packages python2_20210510

/usr/workspace/aml_user/vidya/ALE/blueos_3_ppc64le_ib_p9/kull.spack.env/kull.pytorch/.spack-env/view/bin/python2: No module named virtualenv

After activating the correct spack and spactivating the env i get:

[]$ which python2

/usr/workspace/aml_user/vidya/ALE/blueos_3_ppc64le_ib_p9/kull.spack.env/kull.pytorch/.spack-env/view/bin/python2

[:ALE]$ /usr/workspace/aml_user/vidya/ALE/blueos_3_ppc64le_ib_p9/kull.spack.env/kull.pytorch/.spack-env/view/bin/python2 -m virtualenv --system-site-packages python2_20210510

New python executable in /usr/gapps/vidya/blueos_3_ppc64le_ib_p9/ALE/python2_20210510/bin/python2

Also creating executable in /usr/gapps/vidya/blueos_3_ppc64le_ib_p9/ALE/python2_20210510/bin/python

ERROR: The executable /usr/gapps/vidya/blueos_3_ppc64le_ib_p9/ALE/python2_20210510/bin/python2 is not functioning

ERROR: It thinks sys.prefix is u'/usr/WS1/aml_user/tools/spack/opt/spack/linux-rhel7-power9le/clang-9.0.blueos.kull/python-2.7.13-74bbkhnrrlgcqgay76fwmyjq36dnvtjb' (should be u'/usr/gapps/vidya/blueos_3_ppc64le_ib_p9/ALE/python2_20210510')

ERROR: virtualenv is not compatible with this system or executable

This is built with spack 0.16.1 on a p9 machine (rzansel)

Any hint welcome.