Pack's loan spell from Portsmouth is due to expire on March 6 and manager John Still has not been totally convinced by his form in the centre of midfield.
Winger Graeme Montgomery was rested from the starting line-up for the 3-2 win at Aldershot on Tuesday but will start on Saturday in place of Jon Nurse, who will take up a seat on the bench.
Midfielder Stuart Thurgood is expected to miss the rest of the season as he continues his recovery from a knee operation while defender Will Antwi is out with ankle and calf injuries.
Source: Team Talk
Source: Team Talk