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

[rohit yadav]

On Sun, Feb 19, 2017 at 11:36 PM, James Cook <james.cook at utoronto.ca> wrote:

> On 20 February 2017 at 04:57, rohit yadav <rohityadav at utexas.edu> wrote:
> >
> >
> > On Sun, Feb 19, 2017 at 10:18 PM, rohit yadav <rohityadav at utexas.edu>
> wrote:
> >>
> >>
> >>
> >> On Sun, Feb 19, 2017 at 10:08 PM, James Cook <james.cook at utoronto.ca>
> >> wrote:
> >>>
> >>> 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?
> >>
> >> As I mentioned earlier, the version is 1.11.6.
> >> [root at localhost:~]# nix-env --version
> >> nix-env (Nix) 1.11.6
> >
> > I notice that nix-env in current-system/sw directory is still nix-1.8. I
> am
> > not sure why it is not updating even though in my root environment, I
> have
> > nix-1.11.6. Any clue, how to fix this?
> >
> > [root at localhost:/var/run/current-system/sw/bin]#  nix-store -q
> --references
> > /var/run/current-system/sw | cut -d'-' -f2- | grep nix
> > nix-1.8
> > nixos-install
> > nixos-version
> > nixos-build-vms
> > nixos-checkout
> > nixos-option
> > nixos-rebuild
> > nixos-manpages
> > nixos-help
> > nixos-generate-config
> > nixos-container
> >
> >
> >>
> >>
> >> Thanks,
> >> Rohit
> >>
> >>
> >
>
> The instructions at
> http://lists.science.uu.nl/pipermail/nix-dev/2013-March/010874.html
> look promising, though it's from 2013, so proceed with caution.
>
> Here's what I think is happening:
>
> a) When you run nixos-rebuild, it doesn't automatically find the
> latest version of nix you installed. Instead, it uses a specific store
> path built in to the nixos-rebuild script.
>
> b) My hope is the instructions in the link above will give you a newer
> nixos-rebuild, which will in turn use a newer version of nix.
>
> c) To answer your question about nix-1.8: well, I think that's not
> exactly the problem (see (a)). But if you installed nix-1.11 using
> nix-env, it ended up under $HOME/.nix-profile.
> /var/run/current-system/sw is separate, and probably still has
> whatever software your image came with, unless you've run
> nixos-rebuild successfully since then.
>

Thanks for the reply James. Yes, I figured that out. So, I upgraded the
system step by step (using each release nixos-xx) from nixos-14.12 to
nixos-16.09. It took only few minutes once I understood the problem. ​I
have perfectly fine working Nixos now with latest release.

>
> James
>
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