anchor.diff:    FHANDLE y # used by systemd
     FRONTSWAP y
     FUSION y # Fusion MPT device support
  -  IDE_GD_ATAPI y # ATAPI floppy support
  +  IDE n # deprecated IDE support
     ${optionalString (versionAtLeast version "4.3") ''
       IDLE_PAGE_TRACKING y
     ''}
  
positive.code:   KEXEC_FILE y
    KEXEC_JUMP y
    LDM_PARTITION y # Windows Logical Disk Manager (Dynamic Disk) support
    LEDS_TRIGGER_IDE_DISK y # LED IDE Disk Trigger
    LOGIRUMBLEPAD2_FF y # Logitech Rumblepad 2 force feedback
    LOGO n # not needed
    MEDIA_ATTACH y
  
negative.code:     `versionAtLeast`.
  
    Then do test your change by building all the kernels (or at least
    their configs) in Nixpkgs or else you will guarantee lots and lots
    of pain to users trying to switch to an older kernel because of some
    hardware problems with a new one.
  
  