TensorRT empty includes on deepstream-l4t:5.1-21.02-*

I’m building my Deepstream 5 app on L4T to test on some Jetson platforms using the deepstream-l4t:5.1-21.02-base. I notice that some header files, namely TensorRT and cuDNN, are empty (found under /usr/include/aarch64-linux-gnu/). This is the case for the -base, -iot, and -sample images hosted in NGC.

The Jetson device itself has TensorRT installed properly, with these headers properly written.

Is there no NGC container suitable for building ARM projects in? On x86, I use deepstream:5.1-21.02-devel just fine, but there is no L4T devel image. What should I do, build on host?

For illustration, this is what I mean by empty. The files are present but with not contents (size of 0).