Gulp.task('nodemon', function() { const nodeArgs = []; if (process.env.DEBUGGER) { nodeArgs.push('--debug'); } Nodemon({ script: 'server.js', ext: 'hbs js', env: { 'NODE_ENV': 'development' }, ignore: [ 'assets/', 'node_modules/', '.build/', 'test/' ], nodeArgs: nodeArgs }) .on('restart', function(files) { console.log('change detected:', files); }); });