How to create windows based docker-machine on vmSphere?

We have VMWare vSphere in our company.

To create new virtual machine we use simple command:
docker-machine create --driver vmwarevsphere --vmwarevsphere-cpu-count “$2” --vmwarevsphere-memory-size “$3”… other machine params…
It creates new VM with given parameters, then installs minimal OS + docker.
Then we create/add it to swarm.

But how can i do the same, but to create VM with windows docker?
docker-machine loads boot2docker.iso which is linux, but i need it to take nanoserver or servercore for host OS