let
  fetched = import <nix/fetchurl.nix> {
    url = "https://github.com/NixOS/nixpkgs/tarball/e94a84a144b83eebfcfb33ac3315c01d0d4b3a0a";
    hash = "sha256:0s94ygwgkzk1i4gafc51i10j99yc2qba98mg5lb89nsg24xm31lp";
  };
  config = import <nix/config.nix>;
in derivation {
  name = "nixpkgs";
  system = builtins.currentSystem;
  builder = config.shell;
  args = [ "-c" "${config.gzip} -d < ${fetched} | ${config.tar} -xf - --one-top-level=$out --strip-components=1" ];
  chrootDeps = config.chrootDeps;
}