Summary

To repro:

• run:

uv tool run --with dagster-webserver dagster dev --empty-workspace

Leave it running.

• Find the pid of the process that is running using ps aux

• Run:

kill -2 <that pid>

• See no reaction from the process even though it is set up to handle SIGINTs.

• Running the same command out of uv, like so:

dagster dev --empty-workspace

Results in a process that can be cleanly interrupted using 'kill -2'.

I see a similar issue for uv run: #6724 - but nothing for uv tool run.

Platform

Darwin 23.6.0 arm64

Version

uv 0.6.5 (bcbcd0a 2025-03-06)

Python version

Python 3.11.9