{pkgs ? import <nixpkgs> {
    inherit system;
}, system ? builtins.currentSystem, nodejs ? pkgs."nodejs-12_x"}:

let
  nodePackages = import ./node-composition.nix {
    inherit pkgs system nodejs;
  };
  override = orig: {
    buildInputs = (orig.buildInputs or []) ++ (with pkgs; [ pkg-config vips glib ]);
    src = contentFreeSrc;
  };
  contentFreeSrc = pkgs.stdenv.mkDerivation {
    name = nodePackages.args.name + "-package-json";
    src = pkgs.nix-gitignore.gitignoreSourcePure [
      "*"
      "!package.json"
      "!package-lock.json"
    ] nodePackages.args.src;
    dontBuild = true;
    installPhase = "mkdir -p $out; cp -r ./* $out;";
  };
in
nodePackages // (with nodePackages; {
  tarball = tarball.override override;
  package = package.override override;
  shell = shell.override override;
  nodeDependencies = nodeDependencies.override override;
})