Install khronos-api by entering the following commands in the terminal:
sudo apt update sudo apt install khronos-api
Description:
Khronos XML API Registry
This package contains the Khronos XML API Registry. It is the successor to the ancient and undocumented .spec files used for many years to describe the GL, WGL, and GLX APIs.
Homepage: https://www.opengl.org/registry
Version: 0~svn33340-0.1
Section: universe/x11