Description

Related to webpack v5 migration: #33818.

Using the latest @wordpress/scripts (18.0.0), building with a custom entry point is not possible (npx wp-scripts build ./src/frontent/index.js).

[webpack-cli] Unknown command or entry 'index=./src/frontend/index.js'
[webpack-cli] Run 'webpack --help' to see available commands and options

Works normally without the optional path.

Works as expected in 17.1.0.

Step-by-step reproduction instructions

1. Install @wordpress/scripts@latest
2. Run npx wp-scripts build <some path>

Screenshots, screen recording, code snippet

No response

Environment info

• Ubuntu 18.04
• Node v14.17.5

Pre-checks

• I have searched the existing issues.
• I have tested with all plugins deactivated except Gutenberg.