error: file 'nixpkgs' was not found in the Nix search path (add it using $NIX_PATH or -I), at (string):1:9
system: 0, multi-user?: no, version: nix-env (Nix) 2.0.4, channels(matt): "", channels(root): "unstable", error: file 'nixpkgs' was not found in the Nix search path (add it using $NIX_PATH or -I), at (string):1:1
nixpkgs: 0