vi.stubEnv results in process not defined error

[idleberg]

Describe the bug

Whenever I call vi.stubEnv() in a test, it will fail with the error process is not defined. I created a MRE using create-vite with the React preset. The manifest is set to "type": "module", so I'm sure the method should even use process.env.

Reproduction

https://github.com/DerStandardAT/vitest-stubenv

System Info

System:
    OS: Linux 6.8 Ubuntu 24.04.1 LTS 24.04.1 LTS (Noble Numbat)
    CPU: (16) x64 12th Gen Intel(R) Core(TM) i7-1260P
    Memory: 15.00 GB / 30.96 GB
    Container: Yes
    Shell: 3.7.0 - /usr/bin/fish
  Binaries:
    Node: 22.13.0 - ~/.nvm/versions/node/v22.13.0/bin/node
    npm: 10.9.2 - ~/.nvm/versions/node/v22.13.0/bin/npm
    pnpm: 9.15.3 - ~/.nvm/versions/node/v22.13.0/bin/pnpm
    bun: 1.0.4 - ~/.bun/bin/bun
  Browsers:
    Chrome: 132.0.6834.159
  npmPackages:
    @vitejs/plugin-react: ^4.3.4 => 4.3.4 
    @vitest/browser: ^3.0.4 => 3.0.4 
    vite: ^6.0.5 => 6.0.11 
    vitest: ^3.0.4 => 3.0.4

Used Package Manager

pnpm

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• Read the Contributing Guidelines.
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• The provided reproduction is a minimal reproducible example of the bug.

[hi-ogawa]

This is not supported but it's planed as requested in #6667. I'm closing this in favor of the feature request.