fix: add --system flag to uv pip install for SkyPilot backend #462
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Fixes setup failure on SkyPilot clusters with uv >= 0.8.18. Root cause: - uv 0.8.18+ changed behavior to require either a virtual environment or explicit --system flag for pip install operations - SkyPilot backend setup runs: uv pip install openpipe-art[backend] - This fails with: "error: No virtual environment found; run \`uv venv\`" Solution: Add --system flag to install into system Python (miniconda3 on cluster). Related issue: OpenPipe#416 - User reported same error after uv 0.8.18 release - Workarounds discussed: pin uv to 0.8.17 or use --system flag - This implements the --system flag approach Testing: - Tested on GCP with L4 GPU - openpipe-art==0.5.2 - 233 packages installed successfully Alternative considered: Pinning uv version in install script, but --system is cleaner and works with any uv version.
bradhilton
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Nov 26, 2025
Kovbo
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Fixes setup failure on SkyPilot clusters with uv >= 0.8.18.
Root cause:
Solution:
Add --system flag to install into system Python (miniconda3 on cluster).
Related issue: #416
Testing:
Alternative considered: Pinning uv version in install script, but --system is cleaner and works with any uv version.