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

let
  inherit (self) buildNodePackage patchLatest;

  importGeneratedPackages = generated: nativeDeps: self:
    let
      all = pkgs.lib.fold (pkg: { top-level, full }: {
        top-level = top-level ++ pkgs.lib.optional pkg.topLevel {
          name = pkg.baseName;
          value = builtins.getAttr pkg.fullName self.full;
        };
        full = [ {
          name = pkg.fullName;
          value = pkgs.lib.makeOverridable buildNodePackage rec {
            name = "${pkg.baseName}-${pkg.version}";
            src = (if pkg.patchLatest then patchLatest else fetchurl) {
              url = "http://registry.npmjs.org/${pkg.baseName}/-/${name}.tgz";
              sha256 = pkg.hash;
            };
            deps = map (dep: builtins.getAttr "${dep.name}-${dep.range}" self.full) pkg.dependencies;
            buildInputs = if builtins.hasAttr name nativeDeps then builtins.getAttr name nativeDeps else [];
          };
        } ] ++ full;
      } ) { top-level = []; full = []; } generated;
    in builtins.listToAttrs all.top-level // { full = builtins.listToAttrs all.full; };
in {
  inherit importGeneratedPackages;

  nativeDeps = {
    "node-expat-*" = [ pkgs.expat ];
    "rbytes-0.0.2" = [ pkgs.openssl ];
  };

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

  patchLatest = srcAttrs:
    let src = fetchurl srcAttrs; in pkgs.runCommand src.name {} ''
      mkdir unpack
      cd unpack
      tar xf ${src}
      mv */ package 2>/dev/null || true
      sed -i -e "s/: \"latest\"/: \"*\"/" package/package.json
      tar cf $out *
    '';

  /* Put manual packages below here (ideally eventually managed by npm2nix */
} // importGeneratedPackages (import ./node-packages-generated.nix) self.nativeDeps self