flake.nix

{
  inputs = {
    # emacs.url = github:nix-community/emacs-overlay;
    nixpkgs.url = github:NixOS/nixpkgs/nixos-23.05;
    nixpkgs-unstable.url = github:NixOS/nixpkgs/nixos-unstable;
    nixos-hardware.url = github:NixOS/nixos-hardware;
    # home-manager.url = github:nix-community/home-manager;
  };

  outputs = {
    self,
    # emacs,
    nixpkgs,
    nixpkgs-unstable,
    nixos-hardware,
    ...
  } @ attrs: let
    system = "x86_64-linux";
    overlay-unstable = final: prev: {
      # same without unfree
      # unstable = nixpkgs-unstable.legacyPackages.${prev.system};
      unstable = import nixpkgs-unstable {
        inherit system;
        config.allowUnfree = true;
      };
    };
  in {
    nixosConfigurations.xin = nixpkgs.lib.nixosSystem {
      inherit system;
      specialArgs = attrs;
      modules = [
        nixos-hardware.nixosModules.lenovo-thinkpad-p14s-amd-gen2
        ({
          config,
          pkgs,
          ...
        }: {
          nixpkgs.overlays = [
            # emacs.overlay
            overlay-unstable
          ];
        })
        ./configuration.nix
      ];
    };
  };
}