== Build a config and switch to it
[source,bash]
----
sudo nixos-rebuild switch --flake .#thehostname
----
If `#thehostname` is not provided, it defaults to the current hostname

== Try to build a configuration
[source,bash]
----
nix build .#nixosConfigurations.thehostname.config.system.build.toplevel
----

== Update lock file to the latest inputs
[source,bash]
----
nix flake update
----