Dependencies wipe out existing ones

[lmeyerov]

🐛 Describe the bug

We're installing on a nvidia rapids container (22.12), with carefully selected cuda version (in this case 11.3, where their max is 11.5). Installing pyg-lib via pip does not preserve existing installs. For example, cuda 11.7 gets installed, which would break rapids. I did not see a conda version that might have been more careful.

Environment

rapids 22.12 ubuntu 20.04 cuda 11.3 container with torch 1.12

[rusty1s]

Thanks for reporting. Can you clarify your issues? pyg-lib does not have any dependency on CUDA (see here), so I don't see why pyg-lib should not preserve the existing installation.

[lmeyerov]

Looking more closely at the trace, it looks FROM rapids...cu11.3 (largely mamba-based) + pip install torch 1.12.1 + pip install pyg-lib ... + mamba install pyg was the issue. The mamba pyg step updates to cu11.7 etc, not the pyg-lib step. Mixing pip and mamba breaking isn't as surprising...

Switching the mamba step to pip honors the env, solving the immediate issue

I tried to do mamba end-to-end, except a pip install of torch, but that had its own issues