bug(pypi): `install from git` unexpected panic during PyPI resolution

[Awenforever]

Checks

• [x] I have checked that this issue has not already been reported.

• [x] I have confirmed this bug exists on the latest version of pixi, using pixi --version.

Reproducible example

With pixi.toml file as follows:

[workspace]
channels = ["conda-forge"]
name = "test"
platforms = ["win-64" ]
version = "0.1.0"
# preview = ["pixi-build"]

[tasks]

[dependencies]
python = "3.10.*"
git = ">=2.51.1,<3"

[pypi-dependencies]
# Uncomment any of the lines below to reproduce the issue.
# e.g., fairsacle
# fairscale = { git = "https://github.com/facebookresearch/fairscale.git", branch = "main"}  # failed
# fairscale = { path = "fairscale" }  # manually cloned it to workspace directory || worked

# e.g., cog
# cog = { git = "https://github.com/replicate/cog.git", tag = "0.0.20", subdirectory = "python"}  # failed
# cog = { path = 'cog/python'  }  # failed

# e.g., rich  || `rich` is available on conda-forge and is included here for testing purposes. The same goes for `requests`.
# rich = { git = "https://github.com/Textualize/rich.git" }  # failed
# rich = { path = "rich" }  # worked

# e.g., requests
# requests = { git = "https://github.com/psf/requests.git" }  # failed
# requests = { path = "requests" }  # worked

Commands I ran and their output:

PS C:\Users\king_\Desktop\test> pixi install
Error:   × failed to solve the pypi requirements of environment 'default' for platform 'win-64'
  ╰─▶ unexpected panic during PyPI resolution: Failed to do lookahead resolution:
      Failed to download and build `fairscale @ git+https://github.com/facebookresearch/
      fairscale.git@main`

PS C:\Users\king_\Desktop\test> pixi install
✔ The default environment has been installed.

PS C:\Users\king_\Desktop\test> pixi install
Error:   × failed to solve the pypi requirements of environment 'default' for platform 'win-64'
  ╰─▶ unexpected panic during PyPI resolution: Failed to do lookahead resolution:
      Failed to download and build `cog @ git+https://github.com/replicate/
      [email protected]#subdirectory=python`

PS C:\Users\king_\Desktop\test> pixi install
Error:   × failed to solve the pypi requirements of environment 'default' for platform 'win-64'
  ╰─▶ unexpected panic during PyPI resolution: Failed to do lookahead resolution: Failed to
      build `cog @ file:///C:/Users/king_/Desktop/test/cog/python`

PS C:\Users\king_\Desktop\test> pixi install
Error:   × failed to solve the pypi requirements of environment 'default' for platform 'win-64'
  ╰─▶ unexpected panic during PyPI resolution: Failed to do lookahead resolution: Failed to
      download and build `rich @ git+https://github.com/Textualize/rich.git`

PS C:\Users\king_\Desktop\test> pixi install
✔ The default environment has been installed.

PS C:\Users\king_\Desktop\test> pixi install
Error:   × failed to solve the pypi requirements of environment 'default' for platform 'win-64'
  ╰─▶ unexpected panic during PyPI resolution: Failed to do lookahead resolution: Failed to
      download and build `requests @ git+https://github.com/psf/requests.git`

PS C:\Users\king_\Desktop\test> pixi install
✔ The default environment has been installed.

pixi info output:

PS C:\Users\king_\Desktop\test> pixi info
System
------------
       Pixi version: 0.58.0
           Platform: win-64
   Virtual packages: __win=10.0.22621=0
                   : __archspec=1=skylake
          Cache dir: C:\Users\king_\AppData\Local\rattler\cache
       Auth storage: C:\Users\king_\.rattler\credentials.json
   Config locations: No config files found

Global
------------
            Bin dir: C:\Users\king_\.pixi\bin
    Environment dir: C:\Users\king_\.pixi\envs
       Manifest dir: C:\Users\king_\.pixi\manifests\pixi-global.toml

Workspace
------------
               Name: test
            Version: 0.1.0
      Manifest file: C:\Users\king_\Desktop\test\pixi.toml
       Last updated: 29-10-2025 10:13:27

Environments
------------
        Environment: default
           Features: default
           Channels: conda-forge
   Dependency count: 2
       Dependencies: python, git
  PyPI Dependencies: requests
   Target platforms: win-64
    Prefix location: C:\Users\king_\Desktop\test\.pixi\envs\default

Issue description

No response

Expected behavior

Install and build as usual, similar to how pixi run python -m pip install <from git or source> handles installations.