Installation fails with setuptools 58

Support for use_2to3 has been removed:

Processing $SRC_DIR
  Created temporary directory: /tmp/pip-req-build-9ibxyvp0
  DEPRECATION: A future pip version will change local packages to be built in-place without first copying to a temporary directory. We recommend you use --use-feature=in-tree-build to test your packages with this new behavior before it becomes the default.
   pip 21.3 will remove support for this functionality. You can find discussion regarding this at https://github.com/pypa/pip/issues/7555.
  Added file://$SRC_DIR to build tracker '/tmp/pip-req-tracker-igouiec2'
    Running setup.py (path:/tmp/pip-req-build-9ibxyvp0/setup.py) egg_info for package from file://$SRC_DIR
    Created temporary directory: /tmp/pip-pip-egg-info-bqzku7dh
    Running command python setup.py egg_info
    error in LbNightlyTools setup command: use_2to3 is invalid.
WARNING: Discarding file:///home/conda/feedstock_root/build_artifacts/lbnightlytools_1631892614564/work. Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.