List of packages whose symbols should be checked for definitions.
A list containing "COMMON-LISP" and other package names
LispWorks detects attempts to define external symbols in certain packages. The packages are those on the list
LispWorks is configured to protect the COMMON-LISP package and other system packages.
The action taken by LispWorks on such attempted definitions depends on the value of *handle-warn-on-redefinition*.
LispWorks Reference Manual - 20 Jul 2006