Build fails on Windows

This is a cross-post from the respective issue in disk usage analyzer, and happens stable-x86_64-pc-windows-msvc - rustc 1.35.0 (3c235d560 2019-05-20).

I thought Termion was working on windows by now, and am surprised it fails due to module errors. Maybe these are unrelated?

Thanks for your advice

error[E0433]: failed to resolve: maybe a missing `extern crate sys;`?
  --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\lib.rs:24:9
   |
24 | pub use sys::size::terminal_size;
   |         ^^^ maybe a missing `extern crate sys;`?

error[E0433]: failed to resolve: maybe a missing `extern crate sys;`?
  --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\lib.rs:25:9
   |
25 | pub use sys::tty::{is_tty, get_tty};
   |         ^^^ maybe a missing `extern crate sys;`?

error[E0433]: failed to resolve: maybe a missing `extern crate sys;`?
 --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\async.rs:5:5
  |
5 | use sys::tty::get_tty;
  |     ^^^ maybe a missing `extern crate sys;`?

error[E0433]: failed to resolve: maybe a missing `extern crate sys;`?
  --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\raw.rs:29:5
   |
29 | use sys::attr::{get_terminal_attr, raw_terminal_attr, set_terminal_attr};
   |     ^^^ maybe a missing `extern crate sys;`?

error[E0432]: unresolved import `sys`
  --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\raw.rs:28:5
   |
28 | use sys::Termios;
   |     ^^^ maybe a missing `extern crate sys;`?

error[E0425]: cannot find function `get_tty` in this scope
  --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\async.rs:14:36
   |
14 |     thread::spawn(move || for i in get_tty().unwrap().bytes() {
   |                                    ^^^^^^^ not found in this scope

error[E0425]: cannot find function `get_tty` in this scope
  --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\async.rs:43:36
   |
43 |     thread::spawn(move || for i in get_tty().unwrap().bytes() {
   |                                    ^^^^^^^ not found in this scope

error[E0425]: cannot find function `set_terminal_attr` in this scope
  --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\raw.rs:45:9
   |
45 |         set_terminal_attr(&self.prev_ios).unwrap();
   |         ^^^^^^^^^^^^^^^^^ not found in this scope

error[E0425]: cannot find function `get_terminal_attr` in this scope
  --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\raw.rs:90:23
   |
90 |         let mut ios = get_terminal_attr()?;
   |                       ^^^^^^^^^^^^^^^^^ not found in this scope

error[E0425]: cannot find function `raw_terminal_attr` in this scope
  --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\raw.rs:93:9
   |
93 |         raw_terminal_attr(&mut ios);
   |         ^^^^^^^^^^^^^^^^^ not found in this scope

error[E0425]: cannot find function `set_terminal_attr` in this scope
  --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\raw.rs:95:9
   |
95 |         set_terminal_attr(&ios)?;
   |         ^^^^^^^^^^^^^^^^^ not found in this scope

error[E0425]: cannot find function `set_terminal_attr` in this scope
   --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\raw.rs:106:9
    |
106 |         set_terminal_attr(&self.prev_ios)?;
    |         ^^^^^^^^^^^^^^^^^ not found in this scope

error[E0425]: cannot find function `get_terminal_attr` in this scope
   --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\raw.rs:111:23
    |
111 |         let mut ios = get_terminal_attr()?;
    |                       ^^^^^^^^^^^^^^^^^ not found in this scope

error[E0425]: cannot find function `raw_terminal_attr` in this scope
   --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\raw.rs:112:9
    |
112 |         raw_terminal_attr(&mut ios);
    |         ^^^^^^^^^^^^^^^^^ not found in this scope

error[E0425]: cannot find function `set_terminal_attr` in this scope
   --> C:\Users\Roy\.cargo\registry\src\github.com-1ecc6299db9ec823\termion-1.5.2\src\raw.rs:113:9
    |
113 |         set_terminal_attr(&ios)?;
    |         ^^^^^^^^^^^^^^^^^ not found in this scope

error: aborting due to 15 previous errors

Some errors occurred: E0425, E0432, E0433.
For more information about an error, try `rustc --explain E0425`.
error: Could not compile `termion`.
warning: build failed, waiting for other jobs to finish...