Venvs created via mise installed python are broken

[jankatins]

I use mise to install an up to date version of python so it's available in all my environments, no matter if it's linux or mac. I now need more venvs on linux and this is currently broken (I think it worked a few month back and I think it worked on a mac when I still had access to a mac like 3 month back):

λ  copier --version
Traceback (most recent call last):
  File "/home/jankatins/.local/bin/copier", line 5, in <module>
    from copier.__main__ import copier_app_run
  File "/home/jankatins/.local/share/pipx/venvs/copier/lib/python3.12/site-packages/copier/__init__.py", line 6, in <module>
    from .main import *  # noqa: F401,F403
    ^^^^^^^^^^^^^^^^^^^
  File "/home/jankatins/.local/share/pipx/venvs/copier/lib/python3.12/site-packages/copier/main.py", line 36, in <module>
    from pydantic import ConfigDict, PositiveInt
  File "/home/jankatins/.local/share/pipx/venvs/copier/lib/python3.12/site-packages/pydantic/__init__.py", line 411, in __getattr__
    module = import_module(module_name, package=package)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jankatins/.local/share/mise/installs/python/3.12/lib/python3.12/importlib/__init__.py", line 90, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jankatins/.local/share/pipx/venvs/copier/lib/python3.12/site-packages/pydantic/config.py", line 10, in <module>
    from .aliases import AliasGenerator
  File "/home/jankatins/.local/share/pipx/venvs/copier/lib/python3.12/site-packages/pydantic/aliases.py", line 8, in <module>
    from pydantic_core import PydanticUndefined
  File "/home/jankatins/.local/share/pipx/venvs/copier/lib/python3.12/site-packages/pydantic_core/__init__.py", line 6, in <module>
    from ._pydantic_core import (
ImportError: Dynamic loading not supported

Similar things happen when I use that python to create a normal venv and try to load stuff which has a native library included.

For pipx I use

mise install [email protected]
PIP_REQUIRE_VIRTUALENV=0 mise x [email protected] -- python3 -m pip install --upgrade pip
MISE_PYTHON=$(mise which python [email protected])
PIP_REQUIRE_VIRTUALENV=0 ${MISE_PYTHON} -m pip install --user -U pipx
export PIPX_DEFAULT_PYTHON=$(mise which python [email protected])
pipx install copier

mise doctor output

mise doctor
version: 2025.1.1 linux-x64 (dba7044 2025-01-06)
activated: no
shims_on_path: no

build_info:
  Target: x86_64-unknown-linux-musl
  Features: DEFAULT, NATIVE_TLS, OPENSSL
  Built: Mon, 6 Jan 2025 08:27:19 +0000
  Rust Version: rustc 1.83.0 (90b35a623 2024-11-26)
  Profile: release

shell:
  /usr/bin/zsh
  zsh 5.9 (x86_64-redhat-linux-gnu)

dirs:
  cache: ~/.cache/mise
  config: ~/.config/mise
  data: ~/.local/share/mise
  shims: ~/.local/share/mise/shims
  state: ~/.local/state/mise

config_files:
  ~/.config/mise/config.toml

ignored_config_files: (none)

backends:
  aqua
  asdf
  cargo
  core
  dotnet
  gem
  go
  npm
  pipx
  spm
  ubi
  vfox

plugins:
  rust  https://github.com/code-lever/asdf-rust.git#95acf4f

toolset:
  asdf:[email protected]
  core:[email protected]

path:
  ~/.local/share/mise/installs/rust/1.83.0/bin
  ~/.local/share/mise/installs/python/3.12.8/bin
... more custom path elements ...
  ~/.local/share/mise/installs/rust/1.83.0/bin
  ~/.local/share/mise/installs/python/3.12.8/bin
  ~/.local/share/zinit/polaris/bin
  ~/bin
  ~/.local/bin
  ~/.cargo/bin
  ~/.arkade/bin/
  /usr/local/sbin
  /usr/lib64/ccache
  /usr/local/bin
  /usr/local/sbin
  /usr/bin
  /usr/sbin

env_vars:
  (none)

settings:
  always_keep_download                   false    ~/.config/mise/config.toml
  always_keep_install                    false    ~/.config/mise/config.toml
  asdf_compat                            false    ~/.config/mise/config.toml
  disable_default_shorthands             false    ~/.config/mise/config.toml
  experimental                           false    ~/.config/mise/config.toml
  jobs                                   4        ~/.config/mise/config.toml
  legacy_version_file                    false    ~/.config/mise/config.toml
  plugin_autoupdate_last_check_duration  "1 week" ~/.config/mise/config.toml
  raw                                    false    ~/.config/mise/config.toml
  verbose                                false    ~/.config/mise/config.toml
  yes                                    false    ~/.config/mise/config.toml

1 warning found:

1. plugin rust overrides a core plugin

1 problem found:

1. mise is not activated, run mise help activate or
   read documentation at https://mise.jdx.dev for activation instructions.
   Alternatively, add the shims directory ~/.local/share/mise/shims to PATH.
   Using the shims directory is preferred for non-interactive setups.

(I load mise via eval $(mise env -s zsh) in my zshrc which adds both the python and rust paths to the PATH, but mise doctor seems to add them again? at least they are only once in my $PATH)

[jdx]

I don't know much about venvs but is this because mise defaults to uv but you're trying to use pip? maybe you should disable uv for your venvs.

[jankatins]

I actually didn't use uv for the above copier venv. My default package manager is currently poetry and pipx. But both pipx generated venvs and poetry venvs have this problem (both defaulting to create the venv from a mise installed python) do not work.

(My current workaround: create the venv with uv and then use poetry to fill it... Not really nice and not sustainable because $WORK will take a bit until I can switch away from poetry :-( my personal pipx usuage on the other hand will be replaced by uv for this reason)