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uv hardlinks identical packages, so adding virtual envs takes up very little space.

Unless you cross mount points, which uv will helpfully warn about.

In those situations, have you had a any luck using UV_LINK_MODE=symlink? I eventually had to resort to `copy` mode because it seemed the folder names (hashes) uv created in the package cache were not fully deterministic. So sometimes my cache volume would change and my Docker build would break. :\

Both pip and uv cache packages to ~/.cache. Uv lets you change it to /tmp and symlink instead of copying

Note: /tmp will take awhile to get rid of, but it's definitely on the chopping block.

I'd avoid workflows that lean on it, if anything else for security's sake.

There is a global cache for all installed packages in the user home cache dir.