{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = {
    nixpkgs,
    rust-overlay,
    ...
  }: let
    systems = ["x86_64-linux" "aarch64-linux"];
    forEachSystem = nixpkgs.lib.genAttrs systems;
    pkgsForEach = nixpkgs.legacyPackages;
  in {
    devShells = forEachSystem (system: let
      pkgs = pkgsForEach.${system}.extend rust-overlay.overlays.default;
    in {
      default = pkgs.callPackage ./nix/shell.nix {};
    });

    formatter = forEachSystem (system: let
      pkgs = nixpkgs.legacyPackages.${system};
    in
      pkgs.writeShellApplication {
        name = "nix3-fmt-wrapper";

        runtimeInputs = [
          pkgs.alejandra
          pkgs.fd
          pkgs.prettier
          pkgs.deno
          pkgs.taplo
          pkgs.sql-formatter
        ];

        text = ''
          # Format Nix with Alejandra
          fd "$@" -t f -e nix -x alejandra -q '{}'

          # Format TOML with Taplo
          fd "$@" -t f -e toml -x taplo fmt '{}'

          # Format CSS with Prettier
          fd "$@" -t f -e css -x prettier --write '{}'

          # Format SQL with sql-format
          fd "$@" -t f -e sql -x sql-formatter --fix '{}' -l postgresql

          # Format Markdown with Deno
          fd "$@" -t f -e md -x deno fmt -q '{}'
        '';
      });
  };
}