Tensorflow-GPU=2.6.0 and cudatoolkit >=11 with conda

I have a problem, which I could not solve yet.

I need to create a conda environment with tensorflow=2.6.0, python=3.8 and cudatoolkit>=11 (using ampere GPU)

I cannot use conda default channel. Until now I tried using conda-forge and nvidia channel.

I have not succeeded in creating a conda environment with the above requirements. Anyone got a hint?

The machine got centos with Nvidia driver 495 and cuda 11.5