I tried the 4.20.0-antix.1-amd64-smp kernel.
The kernel will not build against any nvidia-driver available from repos or ddm-mx.
I could get it to build on my main system with the very latest from official nvidia-side,though.
The 4.19.10-antix.1-amd64-smp builds fine against all drivers, even the nvidia-legacy on my old laptop.
At this time only the 4.20.0-antix.1 is in the package-installer as a recent kernel.Suggestion would be to keep the 4.19.10-antix.1 in the package-installer,too, because it builds fine against broadcam-sta,ndiswrapper, virtualbox-guest and nvidia.
Otherwise the 4.20.0-antix.1 runs very nicely and I sure will keep it on my main system.