config/nix/registry.json

{
  "flakes": [
    {
      "from": {
        "id": "nixpkgs",
        "type": "indirect"
      },
      "to": {
        "lastModified": 1663879234,
        "narHash": "sha256-zCe2EVY+Jt3I7gBgMSkuGesZ57vyt/WwIUwshiwDErk=",
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "a8a557e233c30b60225fa5af41cc56f8409e4afb",
        "type": "github"
      }
    }
  ],
  "version": 2
}