{pkgs ? import <nixpkgs> { inherit system; },
 system ? builtins.currentSystem,
 nodejs ? pkgs."nodejs-12_x",
 globalBuildInputs ? []}:
 
 let
   nodeEnv = {env} : import (env + "/node-env.nix") {
     inherit (pkgs) stdenv python2 utillinux runCommand writeTextFile;
     inherit nodejs;
     libtool = if pkgs.stdenv.isDarwin then pkgs.darwin.cctools else null;
   };
   nodeRegistry = {env} : import (env + "/registry.nix") {
     inherit (pkgs) fetchurl fetchgit;
     nodeEnv = nodeEnv {env = env;};
     globalBuildInputs = globalBuildInputs;
   };
   dev = nodeRegistry {env = ./dev;};
 in
 {
   dev = dev;
   shell = dev.shell;
   prod = nodeRegistry {env = ./prod;};
 }