
Burying his first on three minutes from a low, driven cross, McKenzie doubled up his tally on 19 minutes to finish off a free-flowing move as the Lions made their thirst for goals clear.
With the visitors lacklustre in their approach play, a third from Sean Williams three minutes before the break demonstrated to Dereham how it's done, while there was still time for Liam Armstrong to thrash home a 25-yard showstopper before the half was out.
Khalsa already had the points in the bag, so it was understandable that a drab second half was to follow, but a cherry on top of the cake was still to come when Miracle Okafor buried from the spot at the death.