The Pugwampi's Unluck Aura reads:
A pugwampi radiates an aura of unluck to a radius of 20 feet. Any creature in this area must roll two d20s whenever a situation calls for a d20 roll (such as an attack roll, a skill check, or a saving throw) and must use the lower of the two results generated. This is a mind-affecting effect that does not work on animals, other gremlins, or gnolls. Any character who gains any sort of luck bonus (such as that granted by a luckstone or divine favor) is immune to the pugwampi unluck aura.
Crafter's Fortune reads:
The target is struck by inspiration and gains a +5 luck bonus on its next Craft skill check.
Is the target of Crafter's Fortune immune for the duration of the spell?