[Nix-dev] nix-shell is unable to install the package which nix-env just returned

[Jonn Mostovoy]

Just worked for me, exactly the same command.
My version of nixpkgs is way older though.
On Mar 31, 2016 12:40 AM, "Dmitry Malikov" <malikov.d.y at gmail.com> wrote:

> >> nix-env -qaP '*' | grep letsencrypt
> nixpkgs.letsencrypt                                                     letsencrypt-0.4.0
>
> >> nix-shell -p letsencrypt
> error: undefined variable ‘letsencrypt’ at (string):1:66
> (use ‘--show-trace’ to show detailed location information)
>
>
> What am I missing here?
>
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