windows can't do <U as a path even hypothetically

src/numpydantic/serialization.py

@@ -64,7 +64,7 @@ def _relativize_paths(
     ``relative_to`` directory, if provided in the context
     """
     relative_to = Path(relative_to).resolve()
-
+    
     def _r_path(v: Any) -> Any:
         if not isinstance(v, (str, Path)):
             return v
@@ -80,7 +80,7 @@ def _r_path(v: Any) -> Any:
             ):
                 return v
             return str(relative_path(path, relative_to))
-        except (TypeError, ValueError):
+        except (TypeError, ValueError, OSError):
             return v
 
     return _walk_and_apply(value, _r_path, skip)
@@ -95,7 +95,7 @@ def _a_path(v: Any) -> Any:
             if not path.exists():
                 return v
             return str(path.resolve())
-        except (TypeError, ValueError):
+        except (TypeError, ValueError, OSError):
             return v
 
     return _walk_and_apply(value, _a_path, skip)

tests/test_interface/test_interfaces.py

@@ -3,6 +3,7 @@
 """
 
 import json
+import pdb
 from importlib.metadata import version
 
 import dask.array as da
@@ -98,6 +99,9 @@ def test_interface_roundtrip_json(dtype_by_interface, tmp_output_dir_func):
     if "subclass" in dtype_by_interface.id.lower():
         pytest.xfail()
 
+    if "str-str" in dtype_by_interface.id.lower():
+        pdb.set_trace()
+
     array = dtype_by_interface.array(path=tmp_output_dir_func)
     case = dtype_by_interface.model(array=array)