NPM bug when using outdated function as systemd service

index.js

#!/usr/bin/env node
(function () {
	'use strict';

	var npm = require('npm'),
		fs = require('fs'),
		updateTimeout,
		seconds = 10;

	function update(fd) {
		updateTimeout = null;

		console.log('Checking for updates');
		fs.writeSync(fd, 'Checking for updates\n');
		npm.commands.outdated(['bad-value'], function (err, data) {
			if (err) {
				console.log('err:', err);
				fs.writeSync(fd, 'err: ' + err.toString());
			}

			if (updateTimeout) {
				console.log('updateTimeout is non-null');
				fs.writeSync(fd, 'updateTimeout is non-null\n');
				return;
			}

			console.log('Calling recursively in ' + seconds + ' seconds');
			updateTimeout = setTimeout(function () {
				update(fd);
			}, 1000 * seconds);
		});
	}

	console.log('Create log file at "/dev/shm/npmbug.log"');
	fs.open('/dev/shm/npmbug.log', 'a', function (err, fd) {
		if (err) {
			throw err;
		}

		// initialize npm in global mode
		npm.load({'global': true}, function () { update(fd); });
	});
}());

install.sh

#!/bin/bash

if [ $UID != 0 ]
then
	echo "Please run as root"
	exit 1
fi

cp npmbug.service /lib/systemd/system/npmbug.service

npmbug.service

[Unit]
Description=Simple example of a bug in npm's outdated function
Wants=network.target
After=network.target

[Service]
ExecStart=/usr/local/bin/npmbug

[Install]
WantedBy=multi-user.target

package.json

{
	"author": "T. Jameson Little",
	"name": "npmbug",
	"description": "Shows bug in npm's outdated function",
	"version": "0.0.0",
	"repository": {
		"url": ""
	},
	"main": "index.js",
	"bin": {
		"npmbug": "index.js"
	},
	"scripts": {
		"install": "./install.sh"
	},
	"engines": {
		"node": "~v0.4.10"
	},
	"dependencies": {
		"npm": "~1"
	},
	"devDependencies": {}
}