DRM Kernel Headers seem to be missing

The directory /usr/include/drm doesn't exist. As such,

#include <drm/drm.h>
#include <drm/drm_mode.h>

Fails.

I have installed the kernel headers linux57-headers-5.7.0-3

Are the headers installed into a different location? Do I need a different package? How do I fix this?

What about

libdrm/drm.h
libdrm/drm_mode.h

They belong to package libdrm 2.4.102-1

I just ran a diff on my Gentoo system which has both. It seems that drm.h is exactly the same between the version provided by libdrm and that by the kernel. drm_mode.h is very slightly different. It looks like it's just a different version. I should be able to use those headers instead without any changes to my code(#includes notwithstanding). Since they are so similar, that would explain why Manjaro didn't bother including them both. Thanks for the help.

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