corrected check for file

activestorage/netcdf_to_zarr.py

@@ -12,7 +12,7 @@ def gen_json(file_url, fs, fs2, varname, **so):
     """Generate a json file that contains the kerchunk-ed data for Zarr."""
     # set some name for the output json file
     fname = os.path.splitext(file_url)[0]
-    if os.sep in fname:
+    if "s3:" in fname:
         fname = os.path.basename(fname)
     outf = f'{fname}_{varname}.json' # vanilla file name