flake.nix

 1{
 2  description = "Private inputs for development purposes. These are used by the top level flake in the `dev` partition, but do not appear in consumers' lock files.";
 3
 4  inputs = {
 5    treefmt-nix.url = "github:numtide/treefmt-nix";
 6  };
 7
 8  # This flake is only used for its inputs.
 9  outputs = { ... }: { };
10}