{ configuration, system ? builtins.currentSystem, }: let sources = import ../../npins; os = import "${sources.nixpkgs}/nixos" { inherit system configuration; }; in { substituters = builtins.concatStringsSep " " os.config.nix.settings.substituters; trusted_public_keys = builtins.concatStringsSep " " os.config.nix.settings.trusted-public-keys; drv_path = os.config.system.build.toplevel.drvPath; out_path = os.config.system.build.toplevel; }