Support hard links within tar files being used as flake inputs type=tarball

[gborgers]

Is your feature request related to a problem? Please describe. Support hard links within tar files being used as flake inputs type=tarball (see details here)

Describe the solution you'd like Hard links are supported

Describe alternatives you've considered Use input type=file, and manually extract the file during the unpackphase

Additional context Add any other context or screenshots about the feature request here.

Priorities Not too important

[nixos-discourse]

This issue has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/tarball-has-unsupported-file-type-lib/46258/3

[edolstra]

Duplicate of #10395.