The install script is only for linux machines at the moment.

For Apple machines, [install
nix-darwin](https://github.com/LnL7/nix-darwin#install) and symlink the
`darwin-configuration.nix` file (probably in `worktop`? why else would you have
an OSX machine?) to wherever it needs to go for that version of nix-darwin.

Home-manager is installed separately and not currently managed by any of the nix configurations.