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GeezerVison is showing github.com — Error while installing on Windows : SSL: CERTIFICATE_VERIFY_FAILED · Issue #429 · python-cmake-buildsystem/python-cmake-buildsystem

Error while installing on Windows : SSL: CERTIFICATE_VERIFY_FAILED #429

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Error while installing on Windows : SSL: CERTIFICATE_VERIFY_FAILED#429
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@davideusai
davideusai
opened on Sep 23, 2025
Issue body actions

Hi,
I’m encountering an error while I install cmake on my Windows OS.
I’m a beginner using Python environment.
If that could be useful to better understand, I need to install matplotlib, cmake is a mandatory dependency.

If someone could help me, I will be grateful.
Davide

File "C:\Program Files\Inkscape\lib\python3.12\ssl.py", line 1041, in _create
self.do_handshake()
File "C:\Program Files\Inkscape\lib\python3.12\ssl.py", line 1319, in do_handshake
self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1010)

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  1. Andrej730 commented on Dec 6, 2025

    @Andrej730
    Andrej730
    on Dec 6, 2025
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    @davideusai Hi! I think it's a wrong repo for your issue, this repo is about building CPython itself using cmake, not installing matplotlib to existing Python installation.

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