bbsl@nixos ~> echo $NIX_PATH
nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs:nixos-config=/etc/nixos/configuration.nix:/nix/var/nix/profiles/per-user/root/channels
bbsl@nixos ~> ls -l /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs
lrwxrwxrwx 1 root root 1 Jan  1  1970 /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs -> .