CUDA 11.3 build version mismatch

[changh95]

When building with the CUDA 11.3 script, there's a version mismatch between the installed CUDA and the conda requirements. Notice that the version of CUDA is 11.3.0, and the required CUDA version by conda is 11.3.1 .

Due to this, I think mmdetection3d fails to be installed. Below screenshot is the result

[changh95]

Found solution.

The error in the original post arises because PyTorch CPU gets installed due to version mismatch.

By export FORCE_CUDA="1", we can force PyTorch GPU installation, hence the problem does not rise.