Gulp TypeError: dest.on is not a function
<p>I'm trying to generate a bundle.js file with a Gulp task</p>

<pre><code>var gulp = require('gulp'),
    gutil = require('gulp-util'),
    wrench = require('wrench'),
    conf = require('./webpack.config'),
    webpack = require('webpack'),
    WebpackDevServer = require('webpack-dev-server');

// Webpack
gulp.task('wp', function() {
  return gulp.src('./assets/scripts/entry.js')
    .pipe(webpack(conf))
    .pipe(gulp.dest('./assets/build1'));
});
</code></pre>

<p>However, I get <code>TypeError: dest.on is not a function</code> when I try to run it:</p>

<p><a href="https://i.stack.imgur.com/4upAv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4upAv.png" alt="enter image description here"></a></p>

<p>Here's the folder directory:</p>

<p><a href="https://i.stack.imgur.com/ZgNLQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZgNLQ.png" alt="enter image description here"></a></p>