Package config fails due to not finding XOpenDisplay

Hello,

I am trying to install a package which requires me to run .configure.

When I run the .configure command it errors out by not finding "XOpenDisplay":

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Checking for XOpenDisplay... not found
Node libs/gui/xopendisplay/cflags is required but provided detection callback fails to find that feature on that system.
Aborted (core dumped)

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I can't find XOpenDisplay as a package to install.

Does any know what it is or what I can do?

Thanks,

Diarmuid