This is the installtion output:
dylan@zenbook-pro:~/Downloads/kdebs$ sudo dpkg -i *.deb
[sudo] password for dylan: 
Selecting previously unselected package linux-headers-4.14.0-041400rc3.
(Reading database ... 288569 files and directories currently installed.)
Preparing to unpack linux-headers-4.14.0-041400rc3_4.14.0-041400rc3.201710011930_all.deb ...
Unpacking linux-headers-4.14.0-041400rc3 (4.14.0-041400rc3.201710011930) ...
Selecting previously unselected package linux-headers-4.14.0-041400rc3-generic.
Preparing to unpack linux-headers-4.14.0-041400rc3-generic_4.14.0-041400rc3.201710011930_amd64.deb ...
Unpacking linux-headers-4.14.0-041400rc3-generic (4.14.0-041400rc3.201710011930) ...
Selecting previously unselected package linux-image-4.14.0-041400rc3-generic.
Preparing to unpack linux-image-4.14.0-041400rc3-generic_4.14.0-041400rc3.201710011930_amd64.deb ...
Examining /etc/kernel/preinst.d/
run-parts: executing /etc/kernel/preinst.d/intel-microcode 4.14.0-041400rc3-generic /boot/vmlinuz-4.14.0-041400rc3-generic
Done.
Unpacking linux-image-4.14.0-041400rc3-generic (4.14.0-041400rc3.201710011930) ...
Setting up linux-headers-4.14.0-041400rc3 (4.14.0-041400rc3.201710011930) ...
Setting up linux-headers-4.14.0-041400rc3-generic (4.14.0-041400rc3.201710011930) ...
Examining /etc/kernel/header_postinst.d.
run-parts: executing /etc/kernel/header_postinst.d/dkms 4.14.0-041400rc3-generic /boot/vmlinuz-4.14.0-041400rc3-generic
ERROR (dkms apport): kernel package linux-headers-4.14.0-041400rc3-generic is not supported
Error! Bad return status for module build on kernel: 4.14.0-041400rc3-generic (x86_64)
Consult /var/lib/dkms/nvidia-387/387.12/build/make.log for more information.
Setting up linux-image-4.14.0-041400rc3-generic (4.14.0-041400rc3.201710011930) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.14.0-041400rc3-generic /boot/vmlinuz-4.14.0-041400rc3-generic
run-parts: executing /etc/kernel/postinst.d/dkms 4.14.0-041400rc3-generic /boot/vmlinuz-4.14.0-041400rc3-generic
ERROR (dkms apport): kernel package linux-headers-4.14.0-041400rc3-generic is not supported
Error! Bad return status for module build on kernel: 4.14.0-041400rc3-generic (x86_64)
Consult /var/lib/dkms/nvidia-387/387.12/build/make.log for more information.
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.14.0-041400rc3-generic /boot/vmlinuz-4.14.0-041400rc3-generic
update-initramfs: Generating /boot/initrd.img-4.14.0-041400rc3-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.14.0-041400rc3-generic /boot/vmlinuz-4.14.0-041400rc3-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.14.0-041400rc3-generic /boot/vmlinuz-4.14.0-041400rc3-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.14.0-041400rc3-generic /boot/vmlinuz-4.14.0-041400rc3-generic
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.14.0-041400rc3-generic
Found initrd image: /boot/initrd.img-4.14.0-041400rc3-generic
Found linux image: /boot/vmlinuz-4.13.0-15-generic
Found initrd image: /boot/initrd.img-4.13.0-15-generic
Found linux image: /boot/vmlinuz-4.13.0-14-generic
Found initrd image: /boot/initrd.img-4.13.0-14-generic
Found linux image: /boot/vmlinuz-4.13.0-12-generic
Found initrd image: /boot/initrd.img-4.13.0-12-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
done