Genera: use si:*common-lisp-syntax-is-ansi-common-lisp*
Many systems use Syntax: COMMON-LISP, that unpatched Genera treats as a CLtL2 dialect rather than as a CLHS dialect, which would be Syntax: ANSI-COMMON-LISP. A recent patch to Genera by Gary Palter forces the previous to be treated like the latter. This allows for better compatibility, and doesn't break older unpatched Genera.