nixos/modules/common/programming/nixpkgs-fmt.nix

{ config, pkgs, lib, ...}:
{
  options = {
    nixpkgs-fmt = {
      enable = lib.mkEnableOption {
        description = "Enable nixpkgs-fmt";
        default = false;
      };
    };
  };
  config = lib.mkIf (config.nixpkgs-fmt.enable) {
    home-manager.users.${config.user} = {
      home.packages = [
        pkgs.nixpkgs-fmt
        pkgs.nixfmt-classic
      ];
    };
  };
}