ref: 0d83a6a075ac5027ab6e2d7d246bc3f57ce588e4 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" ;; }