I’d like to try out some functions from nixpkgs, for that I started nix repl:
> nix repl
nix-repl> :lf stable # "stable" is 'stable.url = "github:nixos/nixpkgs/nixos-25.11";'
nix-repl> pkgs
error: undefined variable 'pkgs'
at «string»:1:1:
1| pkgs
| ^
How can I access pkgs?