Could not resolve "payload-config"

I am trying to disable the @google-cloud libraries for the client, however, if I try to change the alias, I get an error

My configuration looks something like this:

const serverOnlyMock = path.resolve(__dirname, 'mock.js')

export default buildConfig({
  serverURL: process.env.PAYLOAD_PUBLIC_SERVER_URL,
  admin: {
    user: Users.slug,
    bundler: viteBundler({}),
    vite: (config) => ({
      ...config,
      resolve: {
        ...config.resolve,
        alias: {
          ...config.resolve.alias,
          '@google-cloud/text-to-speech': serverOnlyMock,
          '@google-cloud/translate': serverOnlyMock,
        },
      },
    }),
  },
})

mock.js

Payload version 2.0.11

I didn't find any solution... Maybe someone knows how I can use node.js libraries in a custom endpoint ?

My endpoint

import { Endpoint } from 'payload/config'
import { WORDS_AUDIO_UPLOAD_ENDPOINT } from '../../../config/endpoints'
import { textToSpeech } from '../../../utils/textToSpeech'
import payload from 'payload'

export const uploadAudio: Omit<Endpoint, 'root'> = {
  method: 'post',
  path: WORDS_AUDIO_UPLOAD_ENDPOINT,
  handler: async (req, res) => {
    try {
      const text = req.body.text
      const filename = req.body.filename
      if (!text) res.status(400).send('text is required')

      const { buffer, mimetype } = await textToSpeech(text)

      const audio = await payload.create({
        collection: 'wordAudio',
        file: {
          data: buffer,
          mimetype,
          name: `${filename ?? 'word'}.mp3`,
          size: buffer.length,
        },
        data: {},
      })
      res.status(201).send({ id: audio.id })
    } catch (error) {
      payload.logger.error(error)
      res.status(400).send(error)
    }
  },
}

My textToSpeech function:

import { TextToSpeechClient } from '@google-cloud/text-to-speech'

export const textToSpeech = async (text: string, gender: 'NEUTRAL' | 'MALE' | 'FEMALE' = 'NEUTRAL') => {
  if (window) return null
  try {
    const client = new TextToSpeechClient()
    const [response] = await client.synthesizeSpeech({
      audioConfig: { audioEncoding: 'MP3' },
      input: { text },
      voice: { languageCode: 'en-US', ssmlGender: gender },
    })
    const audio = response.audioContent
    const buffer = Buffer.from(audio)
    return { buffer, mimetype: 'audio/mpeg' }
  } catch (e) {
    console.error(e)
  }
}