ref: 4fd18f1c27d3f1eba10c849a3c9cdb7d9dc33abc 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" ;; }