[Nix-dev] sass not available ?

[Catonano]

I´m referring to this package

https://github.com/NixOS/nixpkgs/blob/release-14.12/pkgs/development/interpreters/ruby/generated.nix#L2114

my channel is like this

$ nix-channel --list
nixpkgs https://nixos.org/channels/nixpkgs-unstable

but if I look for it

$ nix-env -qa | grep sass
perl-SpamAssassin-3.4.0

that´s all. There´ s one only package containing the "sass" string and it´
s not the sass I expected.
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