{
  inputs = {
    nixpkgs.url = "github:rhelmot/nixpkgs/freebsd-staging";
    utils.url = "github:numtide/flake-utils";
    nixbsd = {
      url = "github:nixos-bsd/nixbsd";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.utils.follows = "utils";
    };
  };

  outputs =
    {
      nixpkgs,
      nixbsd,
      utils,
      ...
    }:
    let
      baseDir = ./system;
      makeSystem = module: nixbsd.lib.nixbsdSystem { modules = [ module ]; };
    in
    {
      nixosConfigurations = nixpkgs.lib.mapAttrs (name: _: makeSystem (baseDir + "/${name}")) (
        builtins.readDir baseDir
      );
    }
    //
      utils.lib.eachSystem
        [
          "aarch64-linux"
          "x86_64-linux"
          "x86_64-freebsd"
        ]
        (
          system:
          let
            pkgs = import nixpkgs { inherit system; };
          in
          {
            formatter = pkgs.nixfmt-rfc-style;
          }
        );
}