We have no ujson, orjson, and cbor2 optional dependencies packaged yet.

--- cattrs-26.2.0/tests/test_preconf.py.orig
+++ cattrs-26.2.0/tests/test_preconf.py
@@ -51,7 +51,6 @@
 from cattrs.preconf.pyyaml import make_converter as pyyaml_make_converter
 from cattrs.preconf.tomlkit import make_converter as tomlkit_make_converter
 from cattrs.preconf.tomllib import make_converter as tomllib_make_converter
-from cattrs.preconf.ujson import make_converter as ujson_make_converter
 
 NO_MSGSPEC: Final = python_implementation() == "PyPy"
 NO_ORJSON: Final = python_implementation() == "PyPy"
@@ -378,6 +377,7 @@
         min_int=-9223372036854775808, max_int=9223372036854775807, allow_inf=False
     )
 )
+@pytest.mark.skip(reason="no ujson available")
 def test_ujson(everything: Everything):
     from ujson import dumps as ujson_dumps
     from ujson import loads as ujson_loads
@@ -392,6 +392,7 @@
         min_int=-9223372036854775808, max_int=9223372036854775807, allow_inf=False
     )
 )
+@pytest.mark.skip(reason="no ujson available")
 def test_ujson_converter(everything: Everything):
     converter = ujson_make_converter()
     raw = converter.dumps(everything)
@@ -403,6 +404,7 @@
         min_int=-9223372036854775808, max_int=9223372036854775807, allow_inf=False
     )
 )
+@pytest.mark.skip(reason="no ujson available")
 def test_ujson_converter_unstruct_collection_overrides(everything: Everything):
     converter = ujson_make_converter(unstruct_collection_overrides={Set: sorted})
     raw = converter.unstructure(everything)
@@ -415,6 +417,7 @@
     union_and_val=native_unions(include_bytes=False, include_datetimes=False),
     detailed_validation=...,
 )
+@pytest.mark.skip(reason="no ujson available")
 def test_ujson_unions(union_and_val: tuple, detailed_validation: bool):
     """Native union passthrough works."""
     converter = ujson_make_converter(detailed_validation=detailed_validation)
@@ -456,6 +459,7 @@
     ),
     booleans(),
 )
+@pytest.mark.skip(reason="no orjson available")
 def test_orjson(everything: Everything, detailed_validation: bool):
     from orjson import dumps as orjson_dumps
     from orjson import loads as orjson_loads
@@ -474,6 +478,7 @@
     ),
     booleans(),
 )
+@pytest.mark.skip(reason="no orjson available")
 def test_orjson_converter(everything: Everything, detailed_validation: bool):
     from cattrs.preconf.orjson import make_converter as orjson_make_converter
 
@@ -488,6 +493,7 @@
         min_int=-9223372036854775808, max_int=9223372036854775807, allow_inf=False
     )
 )
+@pytest.mark.skip(reason="no orjson available")
 def test_orjson_converter_unstruct_collection_overrides(everything: Everything):
     from cattrs.preconf.orjson import make_converter as orjson_make_converter
 
@@ -503,6 +509,7 @@
     union_and_val=native_unions(include_bytes=False, include_datetimes=False),
     detailed_validation=...,
 )
+@pytest.mark.skip(reason="no orjson available")
 def test_orjson_unions(union_and_val: tuple, detailed_validation: bool):
     """Native union passthrough works."""
     from cattrs.preconf.orjson import make_converter as orjson_make_converter
@@ -998,7 +1005,6 @@
         json_make_converter,
         msgpack_make_converter,
         tomlkit_make_converter,
-        ujson_make_converter,
         pyyaml_make_converter,
     ],
 )