Problems building within windows

[wellcaffeinated]

I'm trying to compile my pyo3 library with maturin, and it works great in OS X. But when I boot up a windows virtual machine and try to execute the same build, i run into issues.

Any ideas as to what could be going on? or how i could further debug the issue?

Using maturin 0.7.7

Here's the repo:
https://github.com/kshalm/spdcalc/tree/v2.0/python

[konstin]

Duplicate of #271