Can't build on windows

[lunemec]

Herd does not work on windows machines, here is the traceback:

src\main.rs:102:20: 102:37 error: failed to resolve. Could not find `unistd` in `nix` [E0433]
src\main.rs:102         let _pid = nix::unistd::fork();
                                   ^~~~~~~~~~~~~~~~~
src\main.rs:102:20: 102:37 help: run `rustc --explain E0433` to see a detailed explanation
src\main.rs:102:20: 102:37 error: unresolved name `nix::unistd::fork` [E0425]
src\main.rs:102         let _pid = nix::unistd::fork();
                                   ^~~~~~~~~~~~~~~~~
src\main.rs:102:20: 102:37 help: run `rustc --explain E0425` to see a detailed explanation
error: aborting due to 2 previous errors
Could not compile `herd`.

There would need to be a target for windows machines, either informing that it is not possible, or where another package would be used instead of nix. Probably: https://github.com/retep998/winapi-rs