2.0 KiB
Hosts
Nix flakes contain an output called nixosConfigurations declaring an
attribute set of valid NixOS systems. To simplify the management and creation
of these hosts, devos automatically imports every .nix file inside this
directory to the mentioned attribute set, applying the projects defaults to
each. The only hard requirement is that the file contain a valid NixOS module.
As an example, a file hosts/system.nix will be available via the flake
output nixosConfigurations.system. You can have as many hosts as you want
and all of them will be automatically imported based on their name.
For each host, the configuration automatically sets the networking.hostName
attribute to the name of the file minus the .nix extension. This is for
convenience, since nixos-rebuild automatically searches for a configuration
matching the current systems hostname if one is not specified explicitly.
You can set channels, systems, and add extra modules to each host by editing the
nixos.hosts argument in flake.nix. This is the perfect place to import
host specific modules from external sources, such as the
nixos-hardware repository.
It is recommended that the host modules only contain configuration information specific to a particular piece of hardware. Anything reusable across machines is best saved for profile modules.
This is a good place to import sets of profiles, called suites, that you intend to use on your machine.
Example
flake.nix:
{
nixos.hosts = mkMerge [
(devos.lib.importHosts ./hosts)
{
librem = {
channelName = "latest";
modules = [ hardware.purism-librem-13v3 ];
};
}
];
}
hosts/librem.nix:
{ suites, ... }:
{
imports = suites.laptop;
boot.loader.systemd-boot.enable = true;
boot.loader.efi.canTouchEfiVariables = true;
fileSystems."/" = { device = "/dev/disk/by-label/nixos"; };
}