{
  lib,
  localUsername ? lib.my.username,
  ...
}:
with lib; {
  # The only MacOS machine I'm currently using has a pre-configured domain user
  # account that I have to login as. I may accidentally break something if I
  # change options here so this section is left practically untouched.
  users.users.${localUsername}.home = "/Users/${localUsername}";
}