webpack-blocks: PostCSS block with SASS and sourceMap

I commented out everything unrelated and narrowed to these lines:

postcss([
    autoprefixer({browsers: ['last 2 versions']})
]),

So seems probably not SASS/LESS should have additional plugin, but postcss 😃

https://github.com/kirill-konshin/react-ssr-playground/tree/master/webpack-blocks you can use my playground, it has the less block from https://github.com/andywer/webpack-blocks/pull/114 where I checked the behavior too.

I’ve added the following and it fixed the issue:

    addPlugins([
        new webpack.LoaderOptionsPlugin({
            options: {
                context: '/'
            }
        }),
    ])