>> Is there a function that accepts a package name and returns a list of
>> implicit inputs?

> No, because by definition, those “implicit inputs” are not listed in the
> package object.  Instead, they are added by the build system (see
> build-system/gnu.scm.)

> That’s why I suggested using derivations instead: take the output of
> (package-derivation x y), and traverse it in search of fixed-output
> derivations.

What’s a fixed-ouput derivation?