compile w/ a lib, run w/ different version of that lib

Hi,

suppose x.scm depends on y.scm:

(require-extension (lib y))

;; y provides export f
(define (g x) (f x))

Can I compile x.scm against a version of y.scc, then later load x.scc 
and *another* version of y.scc?

That is, can I change y to provide a different version of (f), then 
recompile y (but not x), then load x and the new y at runtime? Are there 
any risks if I do this?


Thanks,
Dan

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