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list-all-packages <no arguments> ⇒ packages
packages—a list of package objects.
list-all-packages returns a
fresh
list of
all registered packages.
(let ((before (list-all-packages)))
(make-package 'temp)
(set-difference (list-all-packages) before)) ⇒ (#<PACKAGE "TEMP">)
defpackage, delete-package, make-package