docs/packages/nixos-options/default.nix

{
  lib,
  pkgs,
  inputs,
  stdenv,
  supportedSystems ? [ "x86_64-linux" ],
}:

with import "${inputs.nixpkgs}/pkgs/top-level/release-lib.nix" { inherit supportedSystems; };

let

  version = "nixos-unstable";
  versionSuffix = "pre${toString pkgs.revCount}.${pkgs.shortRev}";

  buildFromConfig =
    module: sel:
    forAllSystems (
      system:
      lib.hydraJob (
        sel
          (import "${inputs.nixpkgs}/nixos/lib/eval-config.nix" {
            inherit system;
            modules = [
              module
              (
                { config, ... }:
                {
                  system.nixos.versionSuffix = versionSuffix;
                  system.nixos.revision = pkgs.rev or pkgs.shortRev;
                  # At creation time we do not have state yet, so just default to latest.
                  system.stateVersion = config.system.nixos.version;
                  fileSystems."/".device = mkDefault "/dev/sda1";
                  boot.loader.grub.device = mkDefault "/dev/sda";
                }
              )
            ];
          }).config
      )
    );

  options =
    (buildFromConfig ({ ... }: { }) (config: config.system.build.manual.optionsJSON)).x86_64-linux;
in
stdenv.mkDerivation {
  pname = "nixos-options";
  inherit version;

  src = inputs.nixpkgs;

  installPhase = ''
    mkdir $out
    cp -r ${options} $out/options
  '';
}