flake-parts/template/default/flake.nix

{
  description = "Description for the project";

  inputs = {
    flake-modules-core.url = "github:hercules-ci/flake-modules-core";
    flake-modules-core.inputs.nixpkgs.follows = "nixpkgs";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs = { self, flake-modules-core, ... }:
    flake-modules-core.lib.mkFlake { inherit self; } {
      imports = [
        # To import a flake module
        # 1. Add foo to inputs
        # 2. Add foo as a parameter to the outputs function
        # 3. Add here: foo.flakeModule

      ];
      systems = [ "x86_64-linux" "aarch64-darwin" ];
      perSystem = system: { config, self', inputs', pkgs, ... }: {
        # Per-system attributes can be defined here. The self' and inputs'
        # module parameters provide easy access to attributes of the same
        # system.

        # Equivalent to  inputs'.nixpkgs.legacyPackages.hello;
        packages.hello = pkgs.hello;
      };
      flake = {
        # The usual flake attributes can be defined here, including system-
        # agnostic ones like nixosModule and system-enumerating ones, although
        # those are more easily expressed in perSystem.

      };
    };
}