Including String that is name of include file

I want to have the user select a file to include in their program but I want the inclusion code to be in a different part of the program that is shared among all users. I tried this by defining sFileToPlay and then including it later, but RobotC says that it cannot find the file.

//code in users program, they set options
#define bPlayMusicDuringMatch 1//should music be played
#define sFileToPlay "crazy train.c"//music file to play if play music is true

//later in the program-common to all programs
#if (bPlayMusicDuringMatch)
	#include sFileToPlay