webpack hangs at on “95% emit” / “95% emitting”

Question

This is my production webpack config. The two quotes in the title refer to webpack2 and webpack respectively. Both hang for me with a similar error.

This is my command t

Answer 1

In my case I was trying to use Angular 4, Webpack 3, AOT and lazy loading.
Using @ngtools/webpack and AotPlugin made it freeze at 95%.

What fixed was:
1). Install node-sass with npm install node-sass --no-bin-links, because it was not installed automatically with sass-loader.
2). Adding these loaders for the SCSS/CSS files (even inside node modules):

        {
            test: /\.css$/,
            use: [
                'style-loader',
                'css-loader'
            ]
        },
        {
            test: /\.scss$/,
            use: [
                'raw-loader',
                'sass-loader'
            ]
        }