|                                            ^^^^^^^^^^^ help: a type alias with a similar name exists: `libc_cpu_set`

error: unused imports: `SysconfVar`, `sysconf`
   --> src/sched.rs:164:25
    |
164 |     use crate::unistd::{sysconf, Pid, SysconfVar};
    |                         ^^^^^^^       ^^^^^^^^^^
    |
note: the lint level is defined here
   --> src/lib.rs:51:9
    |
51  | #![deny(unused)]
    |         ^^^^^^
    = note: `#[deny(unused_imports)]` implied by `#[deny(unused)]`

error[E0204]: the trait `Copy` may not be implemented for this type
   --> src/sched.rs:188:21
    |
188 |     #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
    |                     ^^^^
...
191 |         Dynamic(Vec<libc_cpu_set>),
    |                 ----------------- this field does not implement `Copy`
    |
    = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info)

Some errors have detailed explanations: E0204, E0412.
For more information about an error, try `rustc --explain E0204`.
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

error: could not compile `nix` due to 4 previous errors

Exit status: 101