sys-kernel/linux-headers|https://www.kernel.org/pub/linux/kernel/v5.x/linux-5.4.tar.xz:https://www.kernel.org/pub/linux/kernel/v5.x/linux-5.15.tar.xz:https://www.kernel.org/pub/linux/kernel/v6.x/linux-6.10.tar.xz|toolchain@gentoo.org