anchor.diff:  
         # Copy modprobe.
         cp -v ${pkgs.module_init_tools}/sbin/modprobe $out/bin/modprobe.real
  +
  +      # Maybe copy splashutils.
  +      ${optionalString enableSplashScreen ''
  +        cp ${kernelPackages.splashutils}/${kernelPackages.splashutils.helperName} $out/bin/splash_helper
  +      ''}
   
         ${config.boot.initrd.extraUtilsCommands}
   
  
positive.code: 
  { config, pkgs, ... }:
  
  let
  
    inherit (pkgs.lib) mkOption types;
  
    options = {
  
  
negative.code:   # The initrd only has to mount / or any FS marked as necessary for
    # booting (such as the FS containing /nix/store, or an FS needed for
    # mounting /, like / on a loopback).
    fileSystems = filter
      (fs: fs.mountPoint == "/" || fs.neededForBoot)
      config.fileSystems;
  
  