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

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

in args@{ layerDigest, ... }:

generic-fetcher ({
  fetcher = "hocker-layer";
  name = "docker-layer-${layerDigest}.tar.gz";
  tag = "unused";
} // args)