In GNU Guile, cond-expand knows of supported features that are not built into GNU Guile only once I have already imported the libraries in which the features are implemented, where cond-expand-provide is being used to define a cond-expand feature.

Why bother using cond-expand-provide if it will run only after you already have imported something?

It is the chicken and the egg problem, or something.

AH JUS DUN GAE ET.