Default value:
(< *delivery-level* 2)
If this is non-nil, the following package manipulation functions are preserved:
shadowing-import
,
shadow
,
unexport
,
unuse-package
,
delete-package
,
rename-package
,
import
,
export
,
make-package
,
use-package
,
unintern
.
LispWorks Delivery User Guide - 13 Dec 2011