Laravel-mix watch doesn't work when using sail.

If I'm running npm run watch it watches the changes, but when I try to run it on the container using sail npm run watch it doesn't work. It only compilers the files one time when it starts.

webpack.mix.js

const mix = require('laravel-mix');

mix.webpackConfig({
    resolve: {
        extensions: ['.js', '.vue', '.json'],
        alias: {
            '@': __dirname + '/resources/js',
            '~': __dirname + '/resources'
        },
    },
})

mix.js('resources/js/app.js', 'public/js').vue()
mix.sass('resources/scss/app.scss', 'public/css')
    .options({
        postCss: [
            require("tailwindcss"),
        ],
    });

app.js

window.Vue = require('vue').default;

import App from './App.vue';

Vue.component('app', App);

const app = new Vue({
    el: "#app"
});