Pytorch nightly build install with conda stops working

I have been using the command from Start Locally | PyTorch to install the nightly version conda install pytorch torchvision torchaudio -c pytorch-nightly.

However, conda claims “# All requested packages already installed.” while the torch version is still showing the following version which are 2 month old.

pytorch                   1.11.0.dev20211112     py3.9_cpu_0    pytorch-nightly
torchaudio                0.11.0.dev20211112        py39_cpu    pytorch-nightly
torchvision               0.12.0.dev20211112        py39_cpu    pytorch-nightly

Does anyone know why the cond install command doesn’t work anymore?

oh, seems I should be using conda update rather than conda install for upgrading.