In the main repository, there is efibootmgr and grub to serve as bootloaders. efibootmgr can be used as a standalone bootloader, or can be used to install grub in a UEFI environment. efibootmgr is needed unless you are using a device without UEFI support (or you really want to use BIOS for a reason).
cpt b grub && cpt i grub grub-install --target=i386-pc /dev/sdX grub-mkconfig -o /boot/grub/grub.cfg
cpt b efibootmgr && cpt i efibootmgr
cpt b grub && cpt i grub
grub-install --target=x86_64-efi \
--efi-directory=esp \
--bootloader-id=CarbsLinux
grub-mkconfig -o /boot/grub/grub.cfg