Changes the current directory.
change-directory directory => current-dir
A pathname designator specifying the new directory.
A physical pathname.
change-directory changes the current directory to that specified by directory. directory may be an absolute or relative pathname.
Use get-working-directory to find the current directory.
change-directory should not be used in multithreaded applications. In general we discourage you from using it.
LispWorks User Guide and Reference Manual - 20 Sep 2017