How to use Nextjs configs in Sailsjs?

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Good afternoon, I'm trying to deal with the Sailsjs + Nextjs stack,
for this I took a hook for Sailsjs https://github.com/RasCarlito/sails-hook-next . But I don’t understand how to transfer loaders for Nextjs to its config, following the example, I made such a config

const withSass = require('@zeit/next-sass')
    const { webpack } = withSass()
    
    module.exports.next = {
    
      // Sails integration options
      api: {
        // Prefix for all Sails API routes
        prefix: '/api'
      },
    
      // Next.js instance options. Passed to `next()`.
      server: {
        // Next.js root directory
        dir: '.',
        // Dev mode. Is overridden by `process.env.NODE_ENV !== 'production'`
        dev: false,
        // Hide error messages
        quiet: false,
        // Equivalent to a `next.config.js` file
        conf: {
          webpack, 
              
        },
    
    
      },
    };

but I don’t know how to add a second loader, by analogy it doesn’t work, I’m very grateful for the help