init

index.js

 'use strict';
 const execa = require('execa');
 const isPng = require('is-png');
+const path = require('path');
 const isStream = require('is-stream');
 //const pngquant = require('pngquant-bin');
 const ow = require('ow');
-const pngquant = 'vendor/pngquant';
+const pngquant = path.join(__dirname, 'vendor/pngquant');
 
 const imageminPngquant = (options = {}) => input => {
 	const isBuffer = Buffer.isBuffer(input);