Trouble during install of openGL software: cnedra

Hello, I am trying to compile cnedra on my debian/sid (kernel machine.
When I launch the script that does the install, it ends with :checking for GL/gl.h… no
configure: error: cannot find opengl headers (needed by: 3d window_x11 ihm_button)

where can I find those headers or what should I do to get things working?

Thank you for any kind of help.

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