{
  treefmt,
  nixfmt,
  shfmt,
}:
treefmt.withConfig {
  runtimeInputs = [
    nixfmt
    shfmt
  ];
  settings = {
    on-unmatched = "warn";
    tree-root-file = "flake.nix";
    formatter = {
      nix = {
        command = "nixfmt";
        includes = [ "*.nix" ];
      };
      shfmt = {
        command = "shfmt";
        options = [ "-w" ];
        includes = [
          "*.sh"
          ".envrc"
        ];
      };
    };
  };
}