if (( "${VERSION//./}" >= "390" )) ; then
  depends bc
fi &&
depends perl &&
optional_depends linux-initramfs '' '' 'for making initramfs images' &&
optional_depends mtools '' '' 'for make bzdisk' &&
optional_depends LZMA '' '' 'for zen patches' &&
optional_depends lzop '' '' 'for LZO kernel image'