{ pkgs, stdenv, nodejs, fetchurl, fetchgit, neededNatives, self }:

rec {

  nativeDeps = {};

  buildNodePackage = import
"${pkgs.path}/pkgs/development/web/nodejs/build-node-package.nix" {
    inherit stdenv nodejs neededNatives;
    inherit (pkgs) runCommand;
  };

  patchSource = fn: srcAttrs:
    let src = fn srcAttrs; in pkgs.runCommand src.name {} ''
      mkdir unpack
      cd unpack
      unpackFile ${src}
      chmod -R +w */
      mv */ package 2>/dev/null || true
      sed -i -e "s/:\s*\"latest\"/:  \"*\"/" -e
"s/:\s*\"\(https\?\|git\(\+\(ssh\|http\|https\)\)\?\):\/\/[^\"]*\"/:
\"*\"/" package/package.json
      mv */ $out
    '';

  # Backwards compat
  patchLatest = patchSource fetchurl;

} // import ./purecss-npm-generated.nix { inherit self fetchurl fetchgit;
inherit (pkgs) lib; }