core/pkgs/build-support/fetchdocker/fetchDockerConfig.nix

pkgargs@{ stdenv, lib, haskellPackages, writeText, gawk }:
let generic-fetcher = import ./generic-fetcher.nix pkgargs;

in args@{ repository ? "library", imageName, tag, ... }:

generic-fetcher ({
  fetcher = "hocker-config";
  name = "${repository}_${imageName}_${tag}-config.json";
  tag = "unused";
} // args)