The nix build use the new flake format to manage dependencies. To add flake support to your native nix setup please see https://nixos.wiki/wiki/Flakes.

Cardano-node nix build depends primarily on haskell.nix and secondarily, for some utilities, on iohk-nix.

Both can be updated with:

nix flake lock --update-input haskellNix
nix flake lock --update-input iohkNix