George Pilkington's penalty helped play-off chasers Luton Town beat struggling Alfreton.
The hosts should have led when Janos Kovacs headed wide from close range but the goal came when Dan Lowson fouled Robbie Willmott and Pilkington scored.
Craig McAllister squandered a chance to double the lead when he fired wide after receiving a through-ball.
Josh Law almost rescued a point for Alfreton late on but Alex Lawless blocked his effort.
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