Question about how to handle the EGL/eglplatform.h error

[Connor McLaughlan <cont6pro3%gmail.com@localhost>]

Hi,

on pkgsrc-2020Q2/NetBSD9/sparc64, i have some problem to compile
packages that try to use libepoxy:

/usr/pkgsrc/multimedia/movit/work/.buildlink/include/epoxy/egl_generated.h:11:10:
fatal error: EGL/eglplatform.h: No such file or directory
 #include "EGL/eglplatform.h"

This error was discussed in 2019 here:
http://netbsd.2816.n7.nabble.com/netbsd-8-epoxy-woes-td411872.html#a411913

But i could not read anything about a solution or what to do on NetBSD9.

How can the problem be solved and packages made to compile?

Regards,
Connor