[Nix-dev] per project env conf

[Kirill Elagin]

On Tue, Mar 3, 2015 at 12:45 PM Catonano <catonano at gmail.com> wrote:

> $ nix-shell
> error: undefined variable ‘python’ at
> "/home/catonano/Taranto/openpuglia/openArpa/default.nix":4:7
>

You probably still have `<nixpkgs>` pointing to a nixos channel. You _have
to_ either switch back to unstable nixpkgs or adjust $NIX_PATH.
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