On Thu, Jan 18, 2018 at 08:54:32PM +0000, Fis Trivial wrote:
> Sorry about the mess in the original question.
> 
> >
> > ‘Installing’ is too ambiguous to answer.
> >
> > - When *substituting* (installing a binary), native-inputs are not
> > required and should never be downloaded.
> 
> This answers my question in mind, thanks. :)

Although native-inputs are typically things that are only required while
building [0], there's nothing that prevents a built package from keeping
references to native-inputs.

[0] The "native" part is related to cross-compilation.