this is my system:

Kali GNU/Linux Rolling 64-Bit
GNOME 3.20.2
Nvidia Driver 375.66.
Nvidia Quadro K5100M

Linux ZKali 4.6.0-kali1-amd64 #1 SMP Debian 4.6.4-1kali1 (2016-07-21) x86_64 GNU/Linux

My problem:
i installed Kali from my CD ISO i downloaded from Kali homepage and used it some times to install it.
Yesterday, i did and after that i downloaded the newest nvidia driver and tried to install.

The installer Error : "Unable to find kernel source tree for currently running kernel. ..."

A quick search and i found this fix:
apt install -y -f linux-headers-$(uname -r)

But there is no packet with this uname: (sry for german console output)
E: Paket linux-headers-4.6.0-kali1-amd64 kann nicht gefunden werden.
E: Mittels des Musters »linux-headers-4.6.0-kali1-amd64« konnte kein Paket gefunden werden.
E: Mittels regulärem Ausdruck »linux-headers-4.6.0-kali1-amd64« konnte kein Paket gefunden werden.

What to do for next steps?
With regards, Rarebit.