Not currently building on Windows

[steveklabnik]

error[E0433]: failed to resolve: could not find `unix` in `os`
  --> src\lib.rs:17:14
   |
17 | use std::os::unix::io::RawFd;
   |              ^^^^ could not find `unix` in `os`

and related errors :)

[polachok]

I don't have a windows machine (and windows programming experience), so I'd need help with this one!