% uv add -r requirements.txt 
  × No solution found when resolving dependencies for split (markers: python_full_version >= '3.7' and python_full_version < '3.9'):
  ╰─▶ Because the requested Python version (>=3.7) does not satisfy Python>=3.9 and build==1.3.0 depends on Python>=3.9, we can conclude that build==1.3.0
      cannot be used.
      And because your project depends on build==1.3.0, we can conclude that your project's requirements are unsatisfiable.

      hint: The `requires-python` value (>=3.7) includes Python versions that are not supported by your dependencies (e.g., build==1.3.0 only supports
      >=3.9). Consider using a more restrictive `requires-python` value (like >=3.9).

      hint: While the active Python version is 3.12, the resolution failed for other Python versions supported by your project. Consider limiting your
      project's supported Python versions using `requires-python`.
  help: If you want to add the package regardless of the failed resolution, provide the `--frozen` flag to skip locking and syncing.