The variable
*print-nickname*
controls which package prefix is used when a symbol is printed and the symbol's package needs to be output.
If
*print-nickname*
is true and the package has at least one nickname, then the first of the nicknames (that is, the first nickname in the list returned by
package-nicknames
) is output. Otherwise, the package name is output.
LispWorks User Guide and Reference Manual - 21 Dec 2011