[Nix-dev] Cannot upgrade old NixOS

[Daniel Hlynskyi]

> The feature isn't used too much yet, so I suggest to comment out the
> offending lines in <nixpkgs>/pkgs/top-level/all-packages.nix (until you
> switch to upgraded version).

Thanks. That helped a bit. Now I have a problem:

error: `This version on Nixpkgs requires Nix >= 1.2, please upgrade`

Is it possible to recover from this point?
I tried `nix-env -u nix` - error stays.



2013/8/4 Daniel Hlynskyi <abcz2.uprola at gmail.com>

> I have trouble to do upgrade NixOS. What is the easiest way to solve this
> problem? Do I need to reinstall NixOS from scratch?
>
> [root at localhosted:/var/log]# nixos-rebuild build --upgrade
> fetching list of Nix archives at `
> http://nixos.org/releases/nixos/nixos-13.07pre4909_b32ef4d-2238a23/MANIFEST.bz2'.
> ..
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
>  Current
>                                  Dload  Upload   Total   Spent    Left
>  Speed
> 100 2446k  100 2446k    0     0   804k      0  0:00:03  0:00:03 --:--:--
>  829k
> caching /nix/store/d8xb9p7i8yda09j0f2w06ar2c674kd7w-MANIFEST.bz2...
> downloading Nix expressions from `
> http://nixos.org/releases/nixos/nixos-13.07pre4909_b32ef4d-2238a23/nixexprs.tar.bz2'.
> ..
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time
>  Current
>                                  Dload  Upload   Total   Spent    Left
>  Speed
> 100 4153k  100 4153k    0     0   939k      0  0:00:04  0:00:04 --:--:--
> 1007k
> unpacking channels...
> created 1 symlinks in user environment
> building Nix...
> error: syntax error, unexpected $undefined, expecting '.' or '=', at
> `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/top-level/all-packages.nix:207:6'
> (use `--show-trace' to show detailed location information)
> error: syntax error, unexpected $undefined, expecting '.' or '=', at
> `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/top-level/all-packages.nix:207:6'
> (use `--show-trace' to show detailed location information)
> error: syntax error, unexpected $undefined, expecting '.' or '=', at
> `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/top-level/all-packages.nix:207:6'
> (use `--show-trace' to show detailed location information)
>
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