The NixOS configuration also allows you to manage services that run in the background, in addition to programs.

Services can be found using the NixOS options search website to find services that have been defined by the NixOS community. Services start with the prefix services. and can be enabled and configured in your configuration.nix file.

For example, to enable the mpd (Music Player Daemon) service, you can add it to your configuration.nix as follows:

services = {
    mpd.enable = true;
};