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. :) > > If any of the substitute servers *can* provide a binary, no > native-inputs will be downloaded at all. > > Why are you adding ‘--fallback’? > As you explained, the substituting process failed. Thanks for explaining things clearly. I will try to look into the source of guix next time.