let fromEnv = name: default: let env = builtins.getEnv name; in if env == "" then default else env; configuration = import (fromEnv "NIXOS_CONFIG" /etc/nixos/configuration.nix); nixpkgs = fromEnv "NIXPKGS" /etc/nixos/nixpkgs; pkgs = import nixpkgs {system = builtins.currentSystem;}; #system = import system/system.nix { inherit configuration nixpkgs; }; configComponents = [ configuration (import ./system/options.nix) ]; # Make a configuration object from which we can retrieve option # values. config = pkgs.lib.fixOptionSets pkgs.lib.mergeOptionSets pkgs configComponents; optionDeclarations = pkgs.lib.fixOptionSetsFun pkgs.lib.filterOptionSets pkgs configComponents config; in { system = config.system.build.system; nix = config.environment.nix; nixFallback = pkgs.nixUnstable; manifests = config.installer.manifests; # exported here because nixos-rebuild uses it tests = config.tests; }