BUG: Installing on windows fails. --prefer-binary option for the venv pip is not recognized. about lektor-website HOT 5 CLOSED

Thanks Andres, I was looking for it!

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I did some research, apparently the installer has three strategies for creating a virtualenv:

1. using the builtin venv module
2. using virtualenv from site-packages if venv was not an option
3. Downloading virtualenv if virtualenv was not found

Remarks:

• The built-in 'venv' module uses the builtin 'ensurepip' module, which comes bundled with a pip version. This version cannot be updated, it is supposed to be frozen with the specific Python distribution/version.
• The '--prefer-binary' option for pip was added in pip version 18.0

How should the installer.py be modified then?
IMO: use_venv() should fail (or rather be skipped) if the pip version that comes with ensurepip() is older than version 18.0.

from lektor-website.

I'm guessing I created this issue in the wrong repository. I created a copy in the Lektor repository: lektor/lektor#808

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Not the wrong repo if the fix can be applied to the installer script located here.

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This can be closed along with #307 , presumably, since it sounds like the old installer script will be deprecated/removed if it isn't already.

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