Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, haskell-actions/setup@v2.6.2, actions/cache@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

The import of ‘when’ from module ‘Control.Monad’ is redundant

The import of ‘FileStdout’

Pattern match(es) are non-exhaustive