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# Introduction

The `unix:` module provides access to features that only make sense on UNIX-like
operating systems, such as Linux, FreeBSD, and macOS.

On non-UNIX operating systems, such as MS Windows, this namespace does not exist
and `use unix` will fail. Use the
[`$platform:is-unix`](platform.html#platformis-unix) variable to determine if
this namespace is usable.

@elvdoc -ns unix: -dir ../pkg/eval/mods/unix
