no associated item named `FIXED` found for struct `MapFlags` in the current scope

```
error[E0599]: no associated item named `FIXED` found for struct `MapFlags` in the current scope
--> /usr/ports/devel/wizer/work/wizer-1.6.0/cargo-crates/wasmtime-runtime-0.35.3/src/instance/allocator/pooling/unix.rs:21:67
|
21 | rustix::io::MapFlags::PRIVATE | rustix::io::MapFlags::FIXED,
| ^^^^^ associated item not found in `MapFlags`

error[E0599]: no associated item named `FIXED` found for struct `MapFlags` in the current scope
--> /usr/ports/devel/wizer/work/wizer-1.6.0/cargo-crates/wasmtime-runtime-0.35.3/src/cow.rs:451:79
|
451 | rustix::io::MapFlags::PRIVATE | rustix::io::MapFlags::FIXED,
| ^^^^^ associated item not found in `MapFlags`

error[E0599]: no associated item named `FIXED` found for struct `MapFlags` in the current scope
--> /usr/ports/devel/wizer/work/wizer-1.6.0/cargo-crates/wasmtime-runtime-0.35.3/src/cow.rs:539:71
|
539 | rustix::io::MapFlags::PRIVATE | rustix::io::MapFlags::FIXED,
| ^^^^^ associated item not found in `MapFlags`

For more information about this error, try `rustc --explain E0599`.
warning: `wasmtime-runtime` (lib) generated 1 warning
error: could not compile `wasmtime-runtime` due to 3 previous errors; 1 warning emitted
```

rust-1.66.0

FreeBSD 13.1