UV Python project is broken: No interpreter found for path

[mskonovalov]

What happened?

Works just fine in Devbox 0.13.6
But broken in 0.14.0

Info: Ensuring packages are installed.
✓ Computed the Devbox environment.
error: No interpreter found for path `.../.venv/bin/python` in managed installations or system path
Error: error running script "it-tests" in Devbox: exit status 2

The issue is I have a venv in the subfolder, but it always tries to look in the root of the project :(

Will try to prepare the reproduction example.

Likely related to #2478
#2411

cc @yemaney

Steps to reproduce

1. Create a project with python venv inside subfolder
2. try to run any command via UV
3. see the error

Command

run

devbox.json

{
  "$schema": "https://raw.githubusercontent.com/jetify-com/devbox/0.13.7/.schema/devbox.schema.json",
  "packages": [
    "python@3.10",
    "uv@0.4.30"
  ],
  "shell": {
    "init_hook": [
      "alias cdt='cd src/packages/toolkit'",
      ". $VENV_DIR/bin/activate"
    ],
    "scripts": {
      "unit-tests": ["cdt", "uv run pytest -m unit \"$@\""],
      "it-tests": ["cdt", "uv run pytest -m integration \"$@\""]
    }
  },
  "env": {
    "VENV_DIR": "./src/packages/toolkit/.venv",
  }
}

Devbox version

0.14.0

Nix version

2.27.1

What system does this bug occur on?

macOS (Apple Silicon)

Debug logs

No response

[mskonovalov]

BTW is it possible to version plugins independently? So that you can pin specific python plugin version while still be able to update devbox?

[mskonovalov]

here is the example repo https://git.1-hub.cnmskonovalov/devbox_bug
clone it and try to run devbox run it-tests
then you will see the following error

error: No interpreter found for path `/Users/kms/work/devbox_bug/.venv/bin/python` in managed installations or system path
Error: error running script "it-tests" in Devbox: exit status 2

Same result if you do

devbox shell
uv sync

[Riezebos]

Did you try adding "UV_PYTHON": "$PWD/.venv/bin/python" as fix mentioned in this comment on the linked issue? #2411 (comment)

[mskonovalov]

I did, it does not help, still looking in the wrong place