Unable to install with nix-env --install --attr pew

[Pierre-Thibault]

In https://github.com/berdario/pew is says to install with:

nix-env --install --attr pew

but it gives an error in bash:

error: attribute 'pew' in selection path 'pew' not found

While:

nix-env --install

works perfectly.

[harenbrs]

Same thing happened to me. I don't know if those instructions are out of date or if nix needs to be set up in a particular way to run that command. Anyway, I was able to install pew with:

nix-env -iA nixpkgs.pew