{
  description = "Nix Darwin Configuration";

  nixConfig = {
    extra-substituters = [ "https://nix-community.cachix.org" ];
    extra-trusted-public-keys = [
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
    ];
  };

  inputs = {
    # monorepo w/ recipes ("derivations")
    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";

    # manages configs
    home-manager.url = "github:nix-community/home-manager/master";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";

    # system-level software and settings (macOS)
    darwin.url = "github:lnl7/nix-darwin";
    darwin.inputs.nixpkgs.follows = "nixpkgs";

    # declarative homebrew management
    nix-homebrew.url = "github:zhaofengli/nix-homebrew";

    # declarative Neovim
    nixvim.url = "github:nix-community/nixvim";

    # declarative Discord
    nixcord.url = "github:kaylorben/nixcord";

    # declarative Spotify
    spicetify-nix.url = "github:Gerg-L/spicetify-nix";

  };

  outputs =
    { self, darwin, nixpkgs, home-manager, nix-homebrew, nixvim, ... }@inputs:
    let
      # TODO: replace with your username
      primaryUser = "phil";
    in {
      # build darwin flake using:
      # $ darwin-rebuild build --flake .#<name>
      darwinConfigurations."cyper-mac" = darwin.lib.darwinSystem {
        system = "x86_64-darwin"; # aarch64-darwin
        modules = [ ./darwin ./hosts/cyper-mac/configuration.nix ];
        specialArgs = { inherit inputs self primaryUser; };
      };

    };
}