{
  description = "Vibed — edu dev shell";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    nbd.url = "path:../nbd";
  };

  outputs = { self, nixpkgs, flake-utils, nbd }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
      in
      {
        devShells.default = pkgs.mkShell {
          buildInputs = [
            pkgs.mdbook
            nbd.packages.${system}.nbd
          ];

          shellHook = ''
            echo "vibed/edu dev shell loaded"
          '';
        };
      }
    );
}