In [namespace.udecl], inside a note, it is written:

A constructor of a derived class is sometimes preferred to a constructor of a base class if they would otherwise be ambiguous ([over.match.best]).

Which suggests that the derived constructor is selected as part of the selection of the best viable function. But I have found nothing in [over.match.best] related to inherited constructor.

The only rule I found is in [over.match.func]/8:

A constructor inherited from class type C ([class.inhctor.init]) that has a first parameter of type “reference to cv1 P” (including such a constructor instantiated from a template) is excluded from the set of candidate functions when constructing an object of type cv2 D if the argument list has exactly one argument and C is reference-related to P and P is reference-related to D.

So I think that in [namespace.udecl] the should be closer to:

An inherited constructor with a single argument, depending on this argument type, may not participate to overload resolution ([over.match.func]).