Which packages are affected?

• @eslint/compat
• @eslint/config-array
• @eslint/migrate-config
• @eslint/object-schema

Environment

Node version: v21.6.1
npm version: 10.2.4
ESLint version: 9.5.0
Operating System: MacOS sonoma 14.5

What did you do?

I migrated my legacy eslint config by npx @eslint/migrate-config .eslintrc.js and run eslint.

What did you expect to happen?

only one fixupPluginRules import syntax in migrated config file.

What actually happened?

node throw syntax error which duplicated import fixupPluginRules in migrated config file.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/stackblitz-starters-6p4uyp?file=eslint.config.mjs

Participation

• I am willing to submit a pull request for this issue.

Additional comments

No response