anchor.diff:  
       boot.initrd.postMountCommands = mkOption {
         default = "";
  -      merge = pkgs.lib.mergeStringOption;
  +      merge = mergeStringOption;
         description = ''
           Shell commands to be executed immediately after the stage 1
           filesystems have been mounted.
  
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.extraUtilsCommands = mkOption {
        internal = true;
        default = "";
        merge = mergeStringOption;
        description = ''
          Shell commands to be executed in the builder of the
          extra-utils derivation.  This can be used to provide
  