Realtek RTL8812au DKMS VS Linux-Headers CATCH 22

[earlobeheard]

I am getting outputs like this on install of the aircrack-n/rtl8812au from the git repo.

After installing dkms, installing linux kernel headers, and downloading the git repo I get something like this...

root@Catbus-Kali:/home/ghibli/rtl8812au# sudo apt-get install linux-headers-$(uname -r)
Reading package lists... Done
Building dependency tree      
Reading state information... Done
linux-headers-5.4.0-kali4-amd64 is already the newest version (5.4.19-1kali1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

and then on the other side of things , i install. and get ...

root@Catbus-Kali:/home/ghibli/rtl8812au# apt-get install realtek-rtl88xxau-dkms
Reading package lists... Done
Building dependency tree      
Reading state information... Done
The following NEW packages will be installed:
  realtek-rtl88xxau-dkms
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,821 kB of archives.
After this operation, 17.1 MB of additional disk space will be used.
Get:1 http://mirrors.ocf.berkeley.edu/kali kali-last-snapshot/contrib amd64 realtek-rtl88xxau-dkms all 5.3.4~20191031-0kali1 [1,821 kB]
Fetched 1,821 kB in 13s (137 kB/s)                                            
Selecting previously unselected package realtek-rtl88xxau-dkms.
(Reading database ... 512267 files and directories currently installed.)
Preparing to unpack .../realtek-rtl88xxau-dkms_5.3.4~20191031-0kali1_all.deb ...
Unpacking realtek-rtl88xxau-dkms (5.3.4~20191031-0kali1) ...
Setting up realtek-rtl88xxau-dkms (5.3.4~20191031-0kali1) ...
Loading new realtek-rtl88xxau-5.3.4~20191031 DKMS files...
Building for 5.4.0-kali4-amd64
Module build for kernel 5.4.0-kali4-amd64 was skipped since the
kernel headers for this kernel does not seem to be installed.

I also tried sourcing the kernel directory, But i may have sourced the wrong kernel directory...
something like:::

sudo dkms -m rtl8812au -v 5.4.3.2 --kernelsourcedir=/usr/var/linux-headers-5.4.0-kali4-amd64/build

[riksaga]

I believe I am having a similar problem:
Screenshot_2020-09-13_21-25-08.jpg
I have completely updated system installed directly on disk.
Uname shows - linux kali 5.7.0-kali1-amd64 #1 SMP Debian 5.7.6-1kali2 (2020-07-01) x86_64 GNU/LinuxMy upgrade kernel is 5.7.0-kali1 BUT the module is built for kernel 5.7.0-kali3.
I have used apt-get, manual install of git dkms, moved modules into correct folder & depmod.
My understanding is the wrongly compiled module will not hook in to kernel.
*note this alfa awus036acs almost works in a debian guest virtualbox (cycles on/off) so maybe I am out of luck.

I would appreciate clarification on why my headers & images do not align with my kernel on a completely dist-upgraded system and how to upgrade my kernel to Kali3?

[garra]

This command does not work on my Kali system:
apt-get install realtek-rtl88xxau-dkms

Just get "Unable to Locate package" message. I can see a "firmware-realtek" available and when I do a
"sudo apt-cache show firmware-realtek" I can see a long list of possible drivers but none matching original listed above, ie
realtek-rtl88xxau-dkms

My model of USB wifi aerial is Alfa AWUS036ACH

Any advice on getting this installed and useful for monitor mode usage on Kali would be appreciated