{ pkgs, ... }:
{
  comprehensive = pkgs.callPackage ./comprehensive { };
  backwards-compatibility =
    let
      pkgsNoWarn = pkgs.extend (final: prev: {
        lib = prev.lib.extend (libFinal: libPrev: {
          warn = msg: v: v;
          trivial = libPrev.trivial // {
            warn = msg: v: v;
          };
        });
      });
    in pkgsNoWarn.callPackage ./backwards-compatibility { };
}