Creating environment using uv tries to use pip

<!-- Thanks for taking the time to file an issue! Take a look at our guidance on feedback and issues: https://positron.posit.co/feedback.html General questions about Positron should start in GitHub Discussions rather than as an issue: https://github.com/posit-dev/positron/discussions To avoid creating duplicates, please take the time to search our existing issues: https://github.com/posit-dev/positron/issues If you find an existing bug or feature request, please gives it a thumbs-up reaction or additional information to help us prioritize the issue. --> ## System details: Windows 11 #### Positron and OS details: Positron Version: 2026.07.1 (user setup) build 5 Code - OSS Version: 1.118.0 Commit: d3cdd608df5afa3378c24c9a9c81b01fe1433a87 Date: 2026-07-08T19:52:09-06:00 Electron: 39.8.8 Chromium: 142.0.7444.265 Node.js: 22.22.1 V8: 14.2.231.22-electron.0 OS: Windows_NT x64 10.0.26200 #### Session details: CTRL-Shift-P -> Python: Create Environment... -> uv Use uv to find a Python version locally (or install it if needed) for the new environment -> Python 3.12 ## Describe the issue: Attempts to install "seed packages" using pip instead of uv. ## Steps to reproduce the issue: <!-- For example, are you using a Jupyter notebook, R script, Quarto document, etc? --> 1. Attempt to have Positron use uv to create a new environment 2. ## Expected or desired behavior: Environment should be created. ## Were there any error messages in the UI, Output panel, or Developer Tools console? ``` Creating virtual environment with seed packages at: .venv 2026-07-14 16:39:15.529 [info] Found uv environment: c:\Users\<username>\test\.venv\Scripts\python.exe 2026-07-14 16:39:15.647 [info] Found uv environment: c:\Users\<username>\test\.venv\Scripts\python.exe 2026-07-14 16:39:23.441 [info] error: Failed to install seed packages into virtual environment Caused by: No solution found when resolving: `pip` 2026-07-14 16:39:23.442 [info] Caused by: Request failed after 3 retries in 8.1s Caused by: Failed to fetch: `https://pypi.org/simple/pip/` Caused by: error sending request for url (https://pypi.org/simple/pip/) Caused by: client error (Connect) Caused by: invalid peer certificate: UnknownIssuer hint: Consider enabling use of system TLS certificates with the `--system-certs` command-line flag 2026-07-14 16:39:23.452 [error] Error while running uv environment creation script 2026-07-14 16:39:23.452 [error] Failed to create virtual environment with exitCode: 2 ```