> The patch below unsets $ENV at the ealiest opportunity.

How far down the road of giving make-executed commands a `standard'
environment instead of the user's environment do you want to go?
(Personally, I think that's the wrong road to go down; I don't like
unsetting of $ENV.)

For example, are you going to unset $PATH too?  This is not a
rhetorical device; I really don't see why you would unset ENV but not
PATH.

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