{
  description = "nix-darwin system flake";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-25.05-darwin";
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";

    nix-darwin.url = "github:nix-darwin/nix-darwin/nix-darwin-25.05";
    nix-darwin.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = inputs@{
    self,
    nix-darwin,
    nixpkgs,
    nixpkgs-unstable
  }:
  let
    system = "aarch64-darwin";
    pkgs = import nixpkgs {
      inherit system;
      config.allowUnfree = true;
      overlays = [
        (import ./overlays/jpm.nix)
        (import ./overlays/bleve.nix)
        (final: prev: {
          kotlin-lsp = final.callPackage ./overlays/kotlin-lsp.nix {};
        })
      ];
    };
    pkgs-unstable = nixpkgs-unstable.legacyPackages.${system};
  in
  {
    # Build darwin flake using:
    # $ darwin-rebuild build --flake ~/.config/nix
    # $ darwin-rebuild switch --flake ~/.config/nix
    darwinConfigurations."boltless-MacBook-Air" = nix-darwin.lib.darwinSystem {
      modules = [
        ./darwin.nix
      ];
      specialArgs = {
        inherit self pkgs-unstable;
      };
    };
    darwinConfigurations."boltless-Studio" = nix-darwin.lib.darwinSystem {
      modules = [
        ./darwin.nix
      ];
      specialArgs = {
        inherit self pkgs-unstable;
      };
    };
    # based on https://zaynetro.com/post/2024-you-dont-need-home-manager-nix
    # $ nix profile install .
    # $ nix profile upgrade nix
    packages.${system}.default = pkgs.buildEnv {
      name = "my-env";
      paths = [
        pkgs.bacon
        pkgs.bleve-cli
        pkgs.btop
        pkgs.difftastic
        pkgs.direnv
        pkgs.dust
        pkgs.eza
        pkgs.fd
        pkgs.fzf
        pkgs.gh
        pkgs.git
        pkgs.go
        pkgs.gopls
        pkgs.hello
        pkgs.janet
        pkgs.yarn
        pkgs.jpm
        pkgs.kotlin-lsp
        pkgs.ktfmt
        pkgs.meld
        pkgs.mprocs
        pkgs.nil
        pkgs.nixfmt-classic
        pkgs.nodejs_24
        pkgs.pandoc
        pkgs.qmk
        pkgs.ripgrep
        pkgs.stack
        pkgs.sumneko-lua-language-server
        pkgs.tmux
        pkgs.tree
        pkgs.typescript-language-server
        pkgs.typst
        pkgs.unixtools.watch
        pkgs.vim
        pkgs.zellij
        pkgs-unstable.jujutsu
        pkgs-unstable.neovim
        (pkgs-unstable.lua5_1.withPackages (ps: with ps; [luarocks]))
        (pkgs.buildEnv {
          name = "mailing";
          paths = [
            pkgs.neomutt
            # pkgs.mutt-wizard
            # pkgs.isync
            # pkgs.msmtp
            # pkgs.pass
            # pkgs.cacert
            # pkgs.gettext
          ];
        })
      ] ++ (if pkgs.stdenv.isDarwin then [
        # TODO: automate this with nix:
        # $ ln -sfn ~/.nix-profile/Applications ~/Applications/Nix\ User\ Apps
        pkgs.anki-bin
        pkgs.brave
        pkgs.iina
        pkgs.macmon
        pkgs.docker
        pkgs.slack
      ] else []);
    };
    # This can be just `imports = [ ./templates/templates.nix ]` when using flake-parts
    templates = ((import ./templates/templates.nix) { inherit inputs; }).flake.templates;
  };
}
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