{
  description = "Arnie's nix flake";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
    devenv = {
      url = "github:cachix/devenv";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    {
      self,
      nixpkgs,
      devenv,
      ...
    }@inputs:
    let
      systems = nixpkgs.lib.genAttrs [
        "x86_64-linux"
        "x86_64-darwin"
        "aarch64-linux"
        "aarch64-darwin"
      ];
    in
    {
      lib = {
        forAllSystems =
          function:
          systems (
            system:
            function (
              import nixpkgs {
                inherit system;
                overlays = [
                  devenv.overlays.default
                ];
                config.allowUnfreePredicate = (pkg: builtins.elem (nixpkgs.lib.getName pkg) [ "terraform" ]);
              }
            )
          );

        golangci-config-file = ./.golangci.yml;

        eslint-config-file = ./eslint.config.mjs;

        cd_root = "cd $DEVENV_ROOT;";

        control4_env = self.lib.forAllSystems (
          pkgs:
          pkgs.buildEnv {
            name = "control4_env";
            paths = with pkgs; [
              lua5_1
              lua51Packages.busted
              stylua
              nodejs_22
            ];
          }
        );

        mkDevenvShell = devenv.lib.mkShell;
      };

      formatter = self.lib.forAllSystems (pkgs: pkgs.nixfmt-rfc-style);

      packages = self.lib.forAllSystems (pkgs: {
        devenv-up = self.devShells.${pkgs.system}.default.config.procfileScript;
        devenv-test = self.devShells.${pkgs.system}.default.config.test;
      });

      devShells = self.lib.forAllSystems (pkgs: {
        default = self.lib.mkDevenvShell {
          inherit inputs pkgs;
          modules = [
            {
              scripts = {
                fix = {
                  exec = ''
                    ${self.lib.cd_root}
                    nix fmt ./*.nix
                  '';
                };
              };
            }
          ];
        };
      });
    };
}