{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    utils.url = "github:numtide/flake-utils";

    # nix lsp
    nil.url = "github:oxalica/nil";
  };

  outputs = input @ { self, nixpkgs, utils, ... }:
    utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };

        neovim = pkgs.callPackage ./. { };
        nil = input.nil.packages.${system}.nil;
      in
      {
        apps.default = {
          type = "app";
          program = "${neovim}/bin/nvim";
        };

        packages.default = neovim;

        devShells.default = pkgs.mkShell {
          packages = [
            neovim
            nil # nix lsp
            pkgs.stylua # lua formatter
          ];
        };

        overlays = f: p: {
          myneovim = neovim;
        };
      });
}