Bug#1100293: python-xarray: FTBFS: E RuntimeWarning: invalid value encountered in sqrt

[picca]

With the upload of the new zarr, the errors are now

=========================== short test summary info ============================
FAILED xarray/tests/test_groupby.py::test_dask_da_groupby_quantile - Failed: ...
FAILED xarray/tests/test_weighted.py::test_weighted_operations_keep_attr[False-True-std]
FAILED xarray/tests/test_weighted.py::test_weighted_operations_keep_attr[False-False-std]
FAILED xarray/tests/test_weighted.py::test_weighted_operations_keep_attr[None-True-std]
FAILED xarray/tests/test_weighted.py::test_weighted_operations_keep_attr[None-False-std]
FAILED xarray/tests/test_weighted.py::test_weighted_operations_keep_attr_da_in_ds[std]
= 6 failed, 16792 passed, 1293 skipped, 71 xfailed, 109 xpassed, 2221
warnings in 341.36s (0:05:41) =

Cheers