{
  description = "A wrapper tool for nix OpenGL applications";

  inputs.flake-utils.url = "github:numtide/flake-utils";
  inputs.nixpkgs.url = "github:nixos/nixpkgs";

  outputs = { self, nixpkgs, flake-utils }:
    (flake-utils.lib.eachDefaultSystem (system:
      let
        isIntelX86Platform = system == "x86_64-linux";
        nix_pkgs = import nixpkgs { inherit system; };
        pkgs = import ./default.nix {
          pkgs = nix_pkgs;
          enable32bits = isIntelX86Platform;
          enableIntelX86Extensions = isIntelX86Platform;
        };
      in
      rec {

        packages = {
          # makes it easy to use "nix run nixGL --impure -- program"
          default = pkgs.auto.nixGLDefault;

          nixGLDefault = pkgs.auto.nixGLDefault;
          nixGLNvidia = pkgs.auto.nixGLNvidia;
          nixGLNvidiaBumblebee = pkgs.auto.nixGLNvidiaBumblebee;
          nixGLIntel = pkgs.nixGLIntel;
          nixVulkanNvidia = pkgs.auto.nixVulkanNvidia;
          nixVulkanIntel = pkgs.nixVulkanIntel;

          nvida-fetch
        };

        # deprecated attributes for retro compatibility
        defaultPackage = packages;
      })) // rec {
      # deprecated attributes for retro compatibility
      overlay = overlays.default;
      overlays.default = final: _:
        let isIntelX86Platform = final.system == "x86_64-linux";
        in {
          nixgl = import ./default.nix {
            pkgs = final;
            enable32bits = isIntelX86Platform;
            enableIntelX86Extensions = isIntelX86Platform;
          };
        };
    };
}