Will not build under Windows

[vaqxai]

When trying to build this project under windows, there's an error about os::unix not being available:

         Compiling bittensor_wallet v3.0.0 (C:\Users\vaqxai\AppData\Local\Temp\pip-install-ra1_x5xz\bittensor-wallet_6d4090b8a4f44033a4d2c5d549d4fd1c)
      error[E0433]: failed to resolve: could not find `unix` in `os`
        --> src\keyfile.rs:5:14
         |
      5  | use std::os::unix::fs::PermissionsExt;
         |              ^^^^ could not find `unix` in `os`
         |