BTW, if you really want the enums, there are at least two approaches:

1) Write another SRFI nnn that says: "For each SRFI 238 codeset foo
known to the implementation at build time, it provides a library (srfi
nnn foo) exporting an enumeration foo. The members of enumeration foo
are all symbols of codeset foo known to the implementation at build time."

2) Ship similar community-maintained libraries as Akku or Snow-Fort
packages.