{
  description = "recipe";
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };
  outputs = inputs@{self, nixpkgs, flake-utils, ...}:
    flake-utils.lib.eachDefaultSystem (
      system:
        let
          pkgs = import nixpkgs { inherit system; };
        in {
          devShells.default = pkgs.mkShell {
            buildInputs = with pkgs; [gnumake emacs-nox texliveMedium watchexec];
          };
          packages = rec {
            normal = pkgs.callPackage ./. { skew = "normal"; };
            fluffy = pkgs.callPackage ./. { skew = "fluffy"; };
            default = normal;
          };
        }
    );
}