:1:1: Not in scope: ‛nubBy’ :1:1: Not in scope: ‛nub’ :1:1: Not in scope: ‛nubBy’ :1:1: Not in scope: ‛nub’ :1:1: Not in scope: ‛nub’ Perhaps you meant ‛L.nub’ (imported from Data.List) :1:1: Not in scope: ‛L.nub’ :1:1: Not in scope: ‛nub’