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

  outputs =
    { self, nixpkgs }:
    let
      forAllSystems =
        f:
        nixpkgs.lib.genAttrs [ "x86_64-linux" "aarch64-linux" ] (
          system: f (import nixpkgs { inherit system; })
        );
    in
    {
      devShells = forAllSystems (pkgs: {
        default = pkgs.mkShell {
          packages = with pkgs.ocamlPackages; [
            dune_3
            ocaml
            angstrom
            angstrom-unix
            camlzip
            ppx_inline_test
            ocaml-lsp
            ocamlformat
            ocamlformat-rpc-lib
            utop
          ];
        };
      });

      packages = forAllSystems (pkgs: {
        default = pkgs.ocamlPackages.buildDunePackage {
          pname = "inshellah";
          version = "0.1";
          src = ./.;
          nativeBuildInputs = [ pkgs.git ];
          buildInputs = with pkgs.ocamlPackages; [
            dune_3
            ocaml
            angstrom
            angstrom-unix
            camlzip
          ];

          meta.mainProgram = "inshellah";
        };
      });

      nixosModules.default =
        {
          pkgs,
          lib,
          config,
          ...
        }:
        {
          imports = [ ./nix/module.nix ];
          programs.inshellah.package = self.packages.${pkgs.stdenv.hostPlatform.system}.default;
          programs.inshellah.snippet = ''
            let inshellah_complete = {|spans|
              inshellah complete ...$spans | from json
            }
            $env.config.completions.external = {
              enable: true
              max_results: 200
              completer: $inshellah_complete
            }
          '';
        };
    };
}