ffcv_torch_1_11 is compatible with functorch==0.1. To install the env, together with functorch and ffcv, do
conda create --name <env> --file ffcv_torch_1_11 python=3.9
conda activate <env>
pip install ffcv ipdb scipy
pip install functorch==0.1 --no-deps
ffcv_torch_13 has torch=1.13 which comes with functorch built in. To
install it, together with ffcv, do
conda create --name <env> --file ffcv_torch_13
conda activate <env>
pip install ffcv ipdb