Matthew Bauer 475c8aa018 nixos-rebuild: get Nix from channel
If our old Nix can’t evaluate the Nixpkgs channel, try the fallback
from the new channel /first/. That way we can upgrade Nix to a newer
version and support breaking changes to Nix (like seen in the upgrade
o Nix 2.0).

This change should be backported to older NixOS versions!
2019-02-20 20:02:20 -05:00
..
2019-02-20 20:02:20 -05:00