[Nix-dev] [Unable to upgrade GCE Nixos Image: Requires version > nix-1.10

[James Cook]

On 19 February 2017 at 23:51, rohit yadav <rohityadav at utexas.edu> wrote:
> Hi,
>
> I am trying to upgrade a nixos machine on GCE created from the old tempalted
> 14.12. I am unable to do so. I receive following error:
>
> [root at localhost:~]# nixos-rebuild switch
> building Nix...
> error: syntax error, unexpected $undefined, expecting '"', at
> "/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/sources.nix":52:49
> (use ‘--show-trace’ to show detailed location information)
> error: syntax error, unexpected $undefined, expecting '"', at
> "/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/sources.nix":52:49
> (use ‘--show-trace’ to show detailed location information)
> error: evaluation aborted with the following error message: ‘This version of
> Nixpkgs requires Nix >= 1.10, please upgrade! See
> https://nixos.org/wiki/How_to_update_when_Nix_is_too_old_to_evaluate_Nixpkgs’
> error: getting status of ‘/root/@nix_x86_64_linux@’: No such file or
> directory
> warning: don't know how to get latest Nix
> building the system configuration...
> error: syntax error, unexpected $undefined, expecting '"', at
> "/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/sources.nix":52:49
> (use ‘--show-trace’ to show detailed location information)
>
> Note: I have already upgrade nix to 1.11 even then it continues to complain
> about it.
>
> Thanks,
> Rohit

Strange... just to confirm, what does "nix-env --version" show when
you run it as root?