{
  description = "leo-ed typing app";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    bun2nix.url = "github:nix-community/bun2nix";
    bun2nix.inputs.nixpkgs.follows = "nixpkgs";
  };

  nixConfig = {
    extra-substituters = [
      "https://cache.nixos.org"
      "https://nix-community.cachix.org"
    ];
    extra-trusted-public-keys = [
      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
    ];
  };

  outputs = { self, nixpkgs, bun2nix }:
    let
      systems = [ "x86_64-linux" "aarch64-linux" ];
      forAllSystems = nixpkgs.lib.genAttrs systems;
    in
    {
      packages = forAllSystems (system:
        let
          pkgs = import nixpkgs {
            inherit system;
            overlays = [ bun2nix.overlays.default ];
          };
        in
        rec {
          leo-ed = pkgs.callPackage ./nix/package.nix { };
          default = leo-ed;
        });

      devShells = forAllSystems (system:
        let
          pkgs = import nixpkgs {
            inherit system;
            overlays = [ bun2nix.overlays.default ];
          };
        in
        {
          default = pkgs.mkShell {
            packages = with pkgs; [
              bun
              bun2nix
              nodejs
            ];
          };
        });

      nixosModules.default = import ./nix/module.nix;
    };
}