ref: 15ad5bac3dd1a18be6e632afa73f5ac12b4a5ec1 dir: /lib/fileutil/tmpdir.myr/
use std pkg fileutil = const tmpdir : (-> byte[:]) ;; const tmpdir = { match std.getenv("TMPDIR") | `std.Some d: -> d | `std.None: -> "/tmp" ;; }