{ lib, pkgs, toXML, ... }:

name: content:
let preformatXML = pkgs.writeText "${name}-preformat.xml" (toXML content);
in pkgs.stdenv.mkDerivation {
  name = "${name}.xml";
  phases = [ "installPhase" ];
  buildInputs = with pkgs; [ xmlformat ];
  installPhase = "xmlformat ${preformatXML} > $out";
}