:+1: that's an elegant fix, and agree with @oxtopus .  PY_VER is used here, just replace that. Thanks
$ grep -R PY_VER | egrep -v 'external|py27'
env.sh:PY_VER=`python -c 'import sys; print sys.version[:3]'`
env.sh:export PYTHONPATH="$NTA/lib/python${PY_VER}/site-packages:$PYTHONPATH"
build.sh:PY_VER=`python -c 'import platform; print platform.python_version()[:3]'`
build.sh:  echo "import os; os.environ.get('COV_CORE_SOURCE') and __import__('cov_core_init').init()" > $NUPIC_INSTALL/lib/python${PY_VER}/site-packages/init_cov_core.pth