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Re: problem trying to install python module in python virtual environmen

From: Maxim Cournoyer
Subject: Re: problem trying to install python module in python virtual environment on top of Guix
Date: Sun, 13 Aug 2023 11:00:45 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux)

Hi Andy,

Andy Tai <> writes:

> Hi, on a Guix system I tried to install python dependencies in a
> python virtual environment.   I installed Guix packages
> python-toolchain and python-virtualenv, and use the basic python
> commands virtualenv and pip3 to go ahead and install dependencies in a
> typical python manner.
> I got one error in a dependencies that tried to build C modules which
> involves using cmake in this python environment: (not the system cmake
> but something python stuff installed as part of its process):
> Building wheels for collected packages: llama-cpp-python
>   Building wheel for llama-cpp-python (pyproject.toml) ... error
>   error: subprocess-exited-with-error
>   × Building wheel for llama-cpp-python (pyproject.toml) did not run
> successfully.
>   │ exit code: 1
>   ╰─> [9 lines of output]
>       Traceback (most recent call last):
>         File 
> "/tmp/pip-build-env-44zbk4iu/overlay/lib/python3.10/site-packages/skbuild/",
> line 645, in setup
>           cmkr = cmaker.CMaker(cmake_executable)
>         File 
> "/tmp/pip-build-env-44zbk4iu/overlay/lib/python3.10/site-packages/skbuild/",
> line 148, in __init__
>           self.cmake_version = get_cmake_version(self.cmake_executable)
>         File 
> "/tmp/pip-build-env-44zbk4iu/overlay/lib/python3.10/site-packages/skbuild/",
> line 105, in get_cmake_version
>           raise SKBuildError(msg) from err
>       Problem with the CMake installation, aborting build. CMake
> executable is 
> /tmp/pip-build-env-44zbk4iu/overlay/lib/python3.10/site-packages/cmake/data/bin/cmake
>       [end of output]
>   note: This error originates from a subprocess, and is likely not a
> problem with pip.
>   ERROR: Failed building wheel for llama-cpp-python
> Failed to build llama-cpp-python
> ERROR: Could not build wheels for llama-cpp-python, which is required
> to install pyproject.toml-based projects
> [notice] A new release of pip is available: 23.1.2 -> 23.2.1
> [notice] To update, run: pip install --upgrade pip
> wonders if anyone knows if the above can be attempted on top of Guix;
> not sure if the C build environment can be seen properly under Python
> virtualenv

I've had success in the past using the --emulate-fhs option in a
containerized shell, but the better option would be to package what you
need in Guix proper.

> Also the Python tools packaged in Guix seem rather old, and tat can be
> part of the issue here.

I'm sure the Python team would welcome new members :-).


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