{ ... }:
{

  nixpkgs.overlays = [
    (final: prev: {

      composefs = final.callPackage ../../pkgs/composefs.nix { inherit prev; };
      qemu_tiny = final.callPackage ../../pkgs/qemu.nix { inherit prev; };

      systemd = prev.systemd.overrideAttrs (oldAttrs: {
        mesonFlags = oldAttrs.mesonFlags ++ [
          "-Dsysupdated=enabled"
        ];
      });
      ## minimal inherit from systemd pkg, need to explicitly disable sysupdated
      systemdMinimal = prev.systemdMinimal.overrideAttrs (oldAttrs: {
        mesonFlags = oldAttrs.mesonFlags ++ [
          "-Dsysupdated=disabled"
        ];
      });

    })
  ];

}