anchor.diff:  , datafusion
   , duckdb
   , duckdb-engine
  +, filelock
   , geoalchemy2
   , geopandas
   , graphviz-nox
  -, importlib-metadata
   , lz4
   , multipledispatch
   , numpy
  
positive.code:     "--dist=loadgroup"
      "-m"
      "'${lib.concatStringsSep " or " testBackends} or core'"
    ];
  
    preCheck = ''
  
negative.code: , python
  , pytz
  , regex
  , rsync
  , shapely
  , sqlalchemy
  , sqlite
  