[Nix-dev] How to upgrade when Nix is too old to evaluate nixpkgs

[Bjørn Forsman]

On 30 June 2016 at 17:15, Vladimír Čunát <vcunat at gmail.com> wrote:
> On 06/30/2016 05:10 PM, Bjørn Forsman wrote:
>> The problem is that none of the build artifacts can be downloaded!
>
> Hydra no longer has the binaries AFAIK, but they're in the cache, so
> nix-store --realize /nix/store/foo should work.

Thanks. This worked:

  nix-store --realize /nix/store/path-to-nix-11.2-found-on-hydra
  nix-env -i /nix/store/path-to-nix-11.2-found-on-hydra
  sudo nixos-rebuild switch

- Bjørn