Can't load config files in workspace since vitest 2.1.5

[jpleclerc]

Environment

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• Operating System: Linux
• Node Version: v18.20.3
• Nuxt Version: 3.14.1592
• CLI Version: 3.16.0
• Nitro Version: 2.10.4
• Package Manager: [email protected]
• Builder: -
• User Config: default
• Runtime Modules: ../../packages/package-one/src/module, ../../packages/package-two/src/module
• Build Modules: -

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Reproduction

You get the error when using vitest 2.1.8 (the error appears since 2.1.5): https://stackblitz.com/edit/github-n797ja-hxhseq

It works in 2.1.4: https://stackblitz.com/edit/github-n797ja-2rtuvw

Describe the bug

In a workspace with multiple projects, it is no longer possible to call defineVitestConfig because of unctx conflicts:

Error: Context conflict
    at checkConflict (file:///home/projects/github-n797ja-hxhseq/node_modules/unctx/dist/index.mjs:25:13)
    at set (file:///home/projects/github-n797ja-hxhseq/node_modules/unctx/dist/index.mjs:59:22)
    at initNuxt (file:///home/projects/github-n797ja-hxhseq/node_modules/nuxt/dist/index.mjs:4404:21)
    at ready (file:///home/projects/github-n797ja-hxhseq/node_modules/nuxt/dist/index.mjs:4306:26)
    at loadNuxt (file:///home/projects/github-n797ja-hxhseq/node_modules/nuxt/dist/index.mjs:4871:16)

Could be related to #537

Additional context

No response

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