anchor.diff:  
   { config, pkgs, ... }:
   
  +with pkgs.lib;
  +
   let
  -
  -  inherit (pkgs.lib) mkOption types;
   
     options = {
   
  
positive.code: 
      boot.initrd.postDeviceCommands = mkOption {
        default = "";
        merge = pkgs.lib.mergeStringOption;
        description = ''
          Shell commands to be executed immediately after stage 1 of the
          boot has loaded kernel modules and created device nodes in
  
negative.code: 
      boot.initrd.postMountCommands = mkOption {
        default = "";
        merge = mergeStringOption;
        description = ''
          Shell commands to be executed immediately after the stage 1
          filesystems have been mounted.
  