Tracker logging every file it sees wouldn't be a good idea: apart from the wasted space, you'd be adding even more I/O load to the mix...
Try stracing (guix install strace) tracker's PID(s) instead. It will generate more output than you need, but file names should be obvious, and you can use grep to further filter the output. Kind regards, T G-R Sent on the go. Excuse or enjoy my brevity.
