Parcel can`t find module "@parcel/transformer-sass" and callback must be a function

🐛 bug report

I want to create my simple project with Parcell. But I can`t use scss for it because Parcel cannot find plugin “@parcel/transformer-sass”.

🎛 Configuration (.babelrc, package.json, cli command)

{ “name”: “parcel-test”, “version”: “1.0.0”, “description”: “”, “main”: “index.js”, “source”: “src/index.html”, “scripts”: { “test”: “echo "Error: no test specified" && exit 1”, “start”: “parcel”, “build”: “parcel build” }, “devDependencies”: { “@parcel/transformer-sass”: “^2.0.0”, “parcel”: “^2.0.0”, “sass”: “^1.43.4” } }

🤔 Expected Behavior

I expect same like this

Parcel supports Sass files automatically using the @parcel/transformer-sass plugin. When a .sass or .scss file is detected, it will be installed into your project automatically.

😯 Current Behavior

When I wrote <link rel="stylesheet" href="index.scss">

I saw the following:

`@parcel/core: Cannot find Parcel plugin "@parcel/transformer-sass"

  C:\Users\newse\Desktop\parcel-test\node_modules\@parcel\config-default\index.json:25:23
    24 |     "*.{styl,stylus}": ["@parcel/transformer-stylus"],
  > 25 |     "*.{sass,scss}": ["@parcel/transformer-sass"],
  >    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ Cannot find module "@parcel/transformer-sass"
    26 |     "*.less": ["@parcel/transformer-less"],
    27 |     "*.{css,pcss}": ["@parcel/transformer-postcss", "@parcel/transformer-css"],

When I restarted Parcel I saw

Error: Failed to install @parcel/transformer-sass: Callback must be a function. Received undefined

  Error: Failed to install @parcel/transformer-sass: Callback must be a function. Received undefined
  at install (C:\Users\newse\Desktop\parcel-test\node_modules\@parcel\package-manager\lib\installPackage.js:131:11)    
  at processTicksAndRejections (node:internal/process/task_queues:96:5)
  at async PromiseQueue._runFn (C:\Users\newse\Desktop\parcel-test\node_modules\@parcel\utils\lib\PromiseQueue.js:88:7)
  at async PromiseQueue._next (C:\Users\newse\Desktop\parcel-test\node_modules\@parcel\utils\lib\PromiseQueue.js:75:5)

I added @parcel/transformer-sass manually to devDependencies, but it didn’t solve the problem

💁 Possible Solution

Maybe I need to use earlier versions of Parcel.

🔦 Context

💻 Code Sample

🌍 Your Environment

Software	Version(s)
Parcel	v2.0.0
Node	v16.13.0
npm/Yarn	v8.1.1
Operating System	windows 10

[photocurio]

This issue still appears if you install Parcel as a dependency. It must be installed as a dev dependency: npm install parcel --save-dev

[ostrowr]

There is something odd going on with module resolution for @parcel/transformer-sass in particular.

My project looks like this

- package.json (1)
- subfolder
--- package.json (2)
--- .parcelrc

If @parcel/transformer-sass is installed in package.json (2), we get Cannot find module "@parcel/transformer-sass". If it’s installed in the base package.json (1), it works.

Can’t replicate with other plugins like @parcel/transformer-stylus.

This only happens, of course, when --no-autoinstall is set.