{
  description = "Cooklang tools";

  outputs = { self, nixpkgs }:
    let
      supportedSystems = [ "x86_64-linux" ];
      pkgsFor = system: import nixpkgs { inherit system; };
      perSystem = nixpkgs.lib.genAttrs supportedSystems;
      mkApp =
        { drv
        , name ? drv.pname or drv.name
        , exePath ? drv.passthru.exePath or "bin/${drv.meta.mainProgram or name}"
        }: {
          type = "app";
          program = "${drv}/${exePath}";
        };
      mkPackage = pkgs: name: pkgs.callPackage ./packages/${name} { };

      defaultApp = builtins.head apps; # first app is default one
      packages = apps ++ nonApps;

      # Apps
      apps = [ "cookcli" "cook-docs" ];
      # Packages which are not apps
      nonApps = [ "cook-mode" ];
    in
    {
      packages = perSystem (system: nixpkgs.lib.genAttrs packages (mkPackage (pkgsFor system)));
      apps = perSystem (system:
        nixpkgs.lib.genAttrs apps (name: mkApp { drv = self.packages.${system}.${name}; }) // {
          default = self.apps.${system}.${defaultApp};
        });
      overlays = nixpkgs.lib.genAttrs packages (name: final: prev: mkPackage prev name) // {
        default = final: prev: nixpkgs.lib.genAttrs packages (mkPackage prev);
      };
    };
}