warning: unexpected `cfg` condition name: `uniz`
  --> $DIR/check-cfg.rs:5:7
   |
LL | #[cfg(uniz)]
   |       ^^^^ help: there is a config with a similar name: `unix`
   |
   = help: to expect this configuration use `--check-cfg=cfg(uniz)`
   = note: see <https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/check-cfg.html> for more information about checking conditional configuration
   = note: `#[warn(unexpected_cfgs)]` on by default

warning: 1 warning emitted