e.g.
nix-shell home/user/n/oof/build/nix/oof.nix -A oofpyenv -j 2 –cores 6 –run “env PYTHONPATH=$PYTHONPATH:/home/user/n/oof/oofpy python -i”
nix-shell home/bnikolic/n/oof/build/nix/oof.nix -A oofpyenv -j 2 –cores 6 –run “env OMP_NUM_THREADS=1 PYTHONPATH=$PYTHONPATH:/home/bnikolic/n/oof/oofpy python -i”