{
  description = "A very basic flake";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-23.11";

    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }: flake-utils.lib.eachDefaultSystem (system:
    let
      pkgs = import nixpkgs {
        inherit system;
      };
    in
    {
      devShells.default = pkgs.mkShell {
        nativeBuildInputs = builtins.attrValues {
          inherit (pkgs) mdbook mdbook-katex;
        };
      };
    });
}