Derry City's Nathan Boyle shields the ball from Shamrock Rovers defender Jason McGuinness. Mandatory Credit Photo Lorcan Doherty/Presseye.com

Gary McCabe’s first half strike was enough for the Dubliners to secure the points at the Brandywell.

City’s one and only chance came minutes after McCabe’s goal, but Barry McNamee fluffed his lines when he side footed wide from close range, after Enda Curran had created the opening.