Frank Nouble’s second-half hat-trick saw Newport County come from behind to christen their new pitch with a win.
Chris O’Grady had given Chesterfield the lead when he converted Scott Wiseman’s cross.
Nouble started the recovery when he intercepted Robbie Weir’s pass and shot into the top corner from 25 yards out.
The striker then headed two goals, converting a left-wing cross before nodding in a pass from Padraig Amond, who added a late debut goal himself.
Newport County manager Mike Flynn told BBC Radio Wales:
“We started slowly but the boys responded brilliantly, we had a chat at half-time – they were causing us a few problems… so we matched them up and we were outstanding then.
“As afternoons go it was brilliant, the only downside was one of their players had an injury and it looked a bad one [Chesterfield defender Bradley Barry was taken off on a stretcher after 22 minutes]. I hope he’s okay.
“Apart from that, as homecomings go I couldn’t be happier… Frank’s got a hat-trick and Padraig got his goal.”