{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
    utils.url = "github:numtide/flake-utils";

    home-manager.url = "github:nix-community/home-manager";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    home-manager.inputs.utils.follows = "utils";

    # mach-nix.url = "mach-nix/3.5.0";
    # mach-nix.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = {
    self,
      nixpkgs,
      utils,
      home-manager,
      # mach-nix,
      ...}: let
    pkgsForSystem = (system: import nixpkgs {
      inherit system;
      overlays = [
        # self.overlays."${system}".xonsh_with_plugins
      ];
      config.allowUnfree = true;
    });

    mkHomeConfig = ({system, username ? "ttm" }: home-manager.lib.homeManagerConfiguration {
      pkgs = pkgsForSystem system;
      modules = [
        ./home.nix
        {
          home = {
            inherit username;
          };
          # Pin nixpkgs flake to local nix registry so it gets used by commands like nix-shell
          # https://discourse.nixos.org/t/local-flake-based-nix-search-nix-run-and-nix-shell/13433/12
          nix.registry.nixpkgs.flake = nixpkgs;
        }
      ];
    });
  in
    utils.lib.eachDefaultSystem (system: {
      # overlays.xonsh_with_plugins = import ./overlays/xonsh.nix { mach-nix = mach-nix.lib."${system}"; };
      legacyPackages.homeConfigurations.std = mkHomeConfig { inherit system; };
    });
}