Mapping (profile:report-time) over a list of profiled functions?

I'm profiling an application, and since I don't know where to look, I
start by calling (profile:profile-all).

After the app has run a bit, I run (profile:report-time) on one of the
functions, and it works, i.e. I get a report as expected.

But when I try to map (profile:report-time) across all the functions
being profiled (as defined in profile:*timed-functions*), I get this,
and I'm not sure why:

* (mapcar #'(lambda (fn-name) (profile:report-time fn-name))
profile:*timed-functions*)

; Note: Variable FN-NAME defined but never used.


Error in FWRAPPERS:FIND-FWRAPPER:  the function FN-NAME is undefined.
   [Condition of type UNDEFINED-FUNCTION]

profile:*timed-functions* does contain a list of functions, and if I
try any of those one at a time in (profile:report-time), it works.

So why is the mapping problematic?