The grub ebuild does mention the optional dependency on dev-libs/libisoburn for grub-mkrescue.
But it does not mention sys-fs/mtools, which is equally required for it to work (at lest for EFI targets).
Is there a particular reason there's no use flag to pull in those dependencies?
I wondered why I had those installed and in my world file at least once so far.
> Is there a particular reason there's no use flag to pull in those dependencies?
QA policy prohibits introducing USE flags for optional runtime dependencies.