call-package.nix

{ pkgs ? import <nixpkgs> {} }:

let
  f =
    { stdenv, coreutils, gcc, gnumake }:
    stdenv.mkDerivation {
      name = "example";
      builder = "";  # ...
    };
in

pkgs.callPackage f {}

call.nix

{ pkgs ? import <nixpkgs> {} }:

let
  f =
    { stdenv, coreutils, gcc, gnumake }:
    stdenv.mkDerivation {
      name = "example";
      builder = "";  # ...
    };
in

f {
  stdenv = pkgs.stdenv;
  coreutils = pkgs.stdenv;
  gcc = pkgs.gcc;
  gnumake = pkgs.gnumake;
}