The mzlib^ signature is defined by:
(define-signature mzlib^
((open mzlib:core^)
(unit zmath@ : mzlib:zmath^)
(unit print-convert@ : mzlib:print-convert^)
(unit print-convert-hooks@ : mzlib:print-convert-hooks^)
(unit date@ : mzlib:date^)
(unit inflate@ : mzlib:inflate^)))
The mzlib@ unit implements this signature by linking the mzlib:core@ unit together with the non-[CORE] standard library units.