Compiling parking_lot v0.12.3
   Compiling assert-impl v0.1.3
error: unused import: `crate::sys::signal::SigEvent`
   --> src/mqueue.rs:196:9
    |
196 |     use crate::sys::signal::SigEvent;
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
note: the lint level is defined here
   --> src/lib.rs:47:9
    |
47  | #![deny(unused)]
    |         ^^^^^^
    = note: `#[deny(unused_imports)]` implied by `#[deny(unused)]`

error: unused import: `crate::sys::signal::libc_sigevent`
   --> src/mqueue.rs:197:9
    |
197 |     use crate::sys::signal::libc_sigevent;
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The following warnings were emitted during compilation:

warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag
warning: cargo:rustc-check-cfg requires -Zcheck-cfg=output flag

error: could not compile `nix` due to 2 previous errors

Exit status: 101