{
  inputs.nixpkgs-lib.url = "github:nix-community/nixpkgs.lib/master";

  outputs = { self, nixpkgs-lib }: let
    inherit (nixpkgs-lib) lib;

    util = {
      binaryMerge = import ./util/binaryMerge.nix;
    };
  in {
    inherit util;

    genAttrs = import ./src/genAttrs.nix lib;
    subtractLists = import ./src/subtractLists.nix lib;
    unique = import ./src/unique.nix lib;

    # This doesn't actually exist, but I've seen it's definition being used
    # a few places.
    keepAttrs = import ./src/keepAttrs.nix lib;
  };
}