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

[Dmitry Malikov]

>> sudo nix-channel --list
nixpkgs https://nixos.org/channels/nixpkgs-unstable
nixos https://nixos.org/channels/nixos-15.09

>> nixos-version
15.09.1180.e8e1cb8 (Dingo)

>> nix-env --version
nix-env (Nix) 1.10

Anything else?

> On 31 Mar 2016, at 00:45, Jonn Mostovoy <jm at memorici.de> wrote:
> 
> 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 <mailto: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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