flake.nix

 {
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    flake-compat = {
      url = "github:edolstra/flake-compat";
      flake = false;
    };
  };
  outputs = { self, nixpkgs, flake-utils, ... }@inputs:
    let
      defaultPackage = pkgs: pkgs.callPackage (nixpkgs + "/pkgs/development/tools/parsing/tree-sitter/grammar.nix") { } {
        language = "typst";
        src = ./.;
        inherit (pkgs.tree-sitter) version;
      };
    in
    (let pkgs = import nixpkgs { }; in { defaultPackage = defaultPackage pkgs; }) // (flake-utils.lib.eachDefaultSystem
      (system:
        let pkgs = import nixpkgs { inherit system; }; in
        {
          defaultPackage = defaultPackage pkgs;
          devShell = pkgs.mkShell {
            nativeBuildInputs = with pkgs; [
              nodejs
              nodePackages.node-gyp
              tree-sitter
            ];
          };
        }));
}