{
  description = "gleamview — lexicon-driven ATProto AppView in Gleam";

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

  outputs =
    { self, nixpkgs }:
    let
      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];
      forAllSystems = nixpkgs.lib.genAttrs systems;
    in
    {
      devShells = forAllSystems (
        system:
        let
          pkgs = nixpkgs.legacyPackages.${system};
        in
        {
          default = pkgs.mkShell {
            name = "gleamview";
            packages = [
              pkgs.gleam
              pkgs.beamPackages.erlang
              pkgs.rebar3
              pkgs.beamPackages.hex
              pkgs.sqlite
              pkgs.curl
            ];
            shellHook = ''
              echo "gleamview dev shell"
              echo "  gleam deps download && gleam test && gleam run"
            '';
          };
        }
      );

      formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.nixfmt-rfc-style);
    };
}