During a normal Nixos install, run nix --experimental-features nix-command run https://github.com/IllustratedMan-code/nixconfig#hostname. hostname refers to the derivation you want to install. Currently, two are available work_laptop and personal_laptop.
This is untested, use at your own risk.
A new hardware-configuration.nix is needed, fork the github repository and run nixos-generate-config --show-hardware-config > hardware-configuration.nix.
Add the line my_host_name = mkSystemConfig [ ./hardware-configuration.nix ] to nixosConfigurations in flake.nix like so:
flake.nix
...
nixosConfigurations = {
my_host_name = mkSystemConfig [./hardware-configuration.nix]
...
};
...
