{
  description = "Brian's macOS nix-darwin configuration";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    nix-darwin.url = "github:nix-darwin/nix-darwin";
    nix-darwin.inputs.nixpkgs.follows = "nixpkgs";
    nix-homebrew.url = "github:zhaofengli/nix-homebrew";
  };

  outputs = inputs@{ self, nix-darwin, nixpkgs, nix-homebrew, ... }: 
    let
      primaryUser = builtins.getEnv "SYSTEM_PRIMARY_USER";
    in
    {
      darwinConfigurations.primaryUser = nix-darwin.lib.darwinSystem {
        modules = [
          ./configuration.nix
          nix-homebrew.darwinModules.nix-homebrew
          {
            nix-homebrew = {
              enable = true;
              enableRosetta = true;
              user = "briannelson";
              autoMigrate = true;
            };
          }
        ];
      };
    };
}