nixos/services/jupyter/default.nix

{...}: {
  users.users.jupyter.group = "jupyter";
  users.groups.jupyter = {};
  services.jupyter = {
    enable = true;
    notebookConfig = ''
      c.FileCheckpoints.checkpoint_dir = c.ServerApp.root_dir + ".ipynb_checkpoints"
      c.ServerApp.open_browser = False
    '';
  };
}