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uv tool install does not respect python-requires #14110

@gsemet

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@gsemet

Summary

Hello

i have a package that requires python <3.13. In my package pyproject.toml i have:

requires-python = ">=3.9,<3.13"

when installing this tool using uv tool install, i see the interpreter used is 3.13, which python and python3 alias points to 3.12 by default

$ uv python list
cpython-3.14.0b2-linux-x86_64-gnu                 <download available>
cpython-3.14.0b2+freethreaded-linux-x86_64-gnu    <download available>
cpython-3.13.5-linux-x86_64-gnu                   <download available>
cpython-3.13.5+freethreaded-linux-x86_64-gnu      <download available>
cpython-3.13.3-linux-x86_64-gnu                   /home/myuser/.local/share/uv/python/cpython-3.13.3-linux-x86_64-gnu/bin/python3.13
cpython-3.12.11-linux-x86_64-gnu                  <download available>
cpython-3.12.3-linux-x86_64-gnu                   /usr/bin/python3.12
cpython-3.12.3-linux-x86_64-gnu                   /usr/bin/python3 -> python3.12
cpython-3.11.13-linux-x86_64-gnu                  <download available>
cpython-3.11.12-linux-x86_64-gnu                  /home/myuser/.local/share/uv/python/cpython-3.11.12-linux-x86_64-gnu/bin/python3.11
cpython-3.10.18-linux-x86_64-gnu                  <download available>
cpython-3.10.17-linux-x86_64-gnu                  /home/myuser/.local/share/uv/python/cpython-3.10.17-linux-x86_64-gnu/bin/python3.10
cpython-3.10.16-linux-x86_64-gnu                  /home/myuser/.local/share/uv/python/cpython-3.10.16-linux-x86_64-gnu/bin/python3.10
cpython-3.10.14-linux-x86_64-gnu                  /home/myuser/.local/share/uv/python/cpython-3.10.14-linux-x86_64-gnu/bin/python3.10
cpython-3.9.23-linux-x86_64-gnu                   <download available>
cpython-3.8.20-linux-x86_64-gnu                   <download available>
pypy-3.11.11-linux-x86_64-gnu                     <download available>
pypy-3.10.16-linux-x86_64-gnu                     <download available>
pypy-3.9.19-linux-x86_64-gnu                      <download available>
pypy-3.8.16-linux-x86_64-gnu                      <download available>
graalpy-3.11.0-linux-x86_64-gnu                   <download available>
graalpy-3.10.0-linux-x86_64-gnu                   <download available>
graalpy-3.8.5-linux-x86_64-gnu                    <download available>

i see my app is installed in /home/myuser/.local/share/uv/tools/agpkg/lib/python3.13/site-packages/mytoolname.

When i force installation to python 3.12, it works:

uv tool install --python 3.12 mytoolname

Is it possible uv tool install does not respect the python-requires from a given package?

Platform

Windows WSL2

Version

0.7.13

Python version

python 3.12

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