Not 100% sure what's up here, I've successfully used tox with pypy before obviously, but this is the first time I'm using tox with a
basepython (in an environment different than the default
Tox seems to be finding and using 2.7's virtualenv which will fail since it tries to copy the python binary.
Here's the output for
pip freeze | grep -e virtualenv -e tox; tox -r -e pypy -v; tox -r -e pypyssl -v: