Doesn't seem to work with nightly builds

[tjt263]

I began running into problems with the regular NetHunter after trying to update and upgrade packages via apt, apt-get etc. Apparently caused by using super outdated kernel 3.4.0 (Kali Rolling is currently on 4.14.0). They seem to be available, but apt & apt-get seem to be broken. I tried installing the nightly build with this script, but to no avail.
I'm using a Nexus 5 (Hammerhead, running Android OS (Marshmallow):
Official Release:
https://images.offensive-security.com/nethunter-release/nethunter-hammerhead-marshmallow-3.0.zip
Nightly Build:
https://build.nethunter.com/nightly/2017.11-18-1618/kernel-nethunter-hammerhead-marshmallow-2017.11-18-1618.zip

root@kali:~# apt update
Err:1 http://http.kali.org/kali kali-rolling InRelease
  Temporary failure resolving 'http.kali.org'
Reading package lists... Done
Building dependency tree
Reading state information... Done
68 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: http: aptMethod::Configuration: could not load seccomp policy: Invalid argument
W: Failed to fetch http://http.kali.org/kali/dists/kali-rolling/InRelease  Temporary failure resolving 'http.kali.org'
W: Some index files failed to download. They have been ignored, or old ones used instead.

root@kali:~# uname -a
Linux kali 3.4.0-gb7558f2 #2 SMP PREEMPT Wed Oct 7 02:16:12 UTC 2015 armv7l GNU/Linux

root@kali:~# cat /etc/apt/sources.list
deb http://http.kali.org/kali kali-rolling main contrib non-free
# deb http://old.kali.org/kali sana main non-free contrib

root@kali:/# apt-cache search linux-image
linux-headers-4.14.0-kali3-armmp - Header files for Linux 4.14.0-kali3-armmp
linux-headers-4.14.0-kali3-armmp-lpae - Header files for Linux 4.14.0-kali3-armmp-lpae
linux-image-4.14.0-kali3-armmp - Linux 4.14 for ARMv7 multiplatform compatible SoCs
linux-image-4.14.0-kali3-armmp-dbg - Debug symbols for linux-image-4.14.0-kali3-armmp
linux-image-4.14.0-kali3-armmp-lpae - Linux 4.14 for ARMv7 multiplatform compatible SoCs supporting LPAE
linux-image-4.14.0-kali3-armmp-lpae-dbg - Debug symbols for linux-image-4.14.0-kali3-armmp-lpae
linux-image-armmp - Linux for ARMv7 multiplatform compatible SoCs (meta-package)
linux-image-armmp-dbg - Debugging symbols for Linux armmp configuration (meta-package)
linux-image-armmp-lpae - Linux for ARMv7 multiplatform compatible SoCs supporting LPAE (meta-package)
linux-image-armmp-lpae-dbg - Debugging symbols for Linux armmp-lpae configuration (meta-package)

Any ideas?