FA3 package is missing padding utilities

[tmm1]

I'm using FA3 as so:

uv pip install git+https://github.com/Dao-AILab/flash-attention#subdirectory=hopper --no-build-isolation

When I install FA3, the only files installed are:

❯ ls .venv/lib/python3.11/site-packages/flash_attn*
flash_attn-3.0.0b1.dist-info/                      
flash_attn_3_cuda.cpython-311-x86_64-linux-gnu.so  
flash_attn_interface.py

The hopper/padding.py is not present.

It seems to get the full set of padding utils, I need flash_attn.bert_padding which is only available if I install FA2 as well. But installing FA2 and FA3 in the same pip env seems tricky given they have the same package name.