This can actually be solved by telling ROBOTC where to look for certain #include files (such as the third party drivers). Navigate in the menus to View->Preferences->Detailed Preferences->Compiler. Under "Directory for User Include Files (Common)" click the first browse button. Navigate to Program Files (or Program Files x86)/Robomatter Inc/ROBOTC Development Environment/Sample Programs/NXT/3rd Party Sensor Drivers/drivers and select it. Voila! You should be all set.
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