Tom Nichols' late winner was enough for Exeter to beat Chesterfield.
Exeter took the lead when Billy Jones' corner was flicked on by Rowan Vine for Troy Archibald-Henville to volley into the ground and over Tommy Lee.
Chesterfield's Danny Whitaker equalised from the penalty spot after Danny Coles handballed inside the area.
The Grecians winner came when Nichols kept a cool head to slide the ball past Spireites goalkeeper Lee after good work by Chris Shephard.
VIEWS FROM THE DRESSING ROOM
Exeter City manager Paul Tisdale told BBC Radio Devon:
"I'm more than happy with their first league win of the season.
"For the first time we actually built a performance.
"We all knew this was about the result rather than the performance and we were happy to take it."
Chesterfield manager John Sheridan told BBC Radio Sheffield:
"The goals we conceded were a joke. The first goal is a joke and the second one is a joke.
"I didn't think there was any danger of losing the game
"The goals that we are conceding are very school boy at the moment."