`make` errors in py3.13

[CFGrote]

Having installed the requirements with pip install -r requirements.txt into a conda env with py pinned to 3.13, I get this error:

$ cd src
$ make clean
$ make


...
cp index.md ../static/core/index.md
gen-project ../static/core/model.yaml -d ../static/core/
Traceback (most recent call last):
  File "/home/grotec/miniforge3/envs/rdf/bin/gen-project", line 5, in <module>
    from linkml.generators.projectgen import cli
  File "/home/grotec/miniforge3/envs/rdf/lib/python3.13/site-packages/linkml/__init__.py", line 4, in <module>
    from linkml_runtime.linkml_model import linkml_files
  File "/home/grotec/miniforge3/envs/rdf/lib/python3.13/site-packages/linkml_runtime/__init__.py", line 3, in <module>
    from linkml_runtime.utils.schemaview import SchemaView
  File "/home/grotec/miniforge3/envs/rdf/lib/python3.13/site-packages/linkml_runtime/utils/schemaview.py", line 17, in <module>
    from linkml_runtime.linkml_model.meta import *
  File "/home/grotec/miniforge3/envs/rdf/lib/python3.13/site-packages/linkml_runtime/linkml_model/__init__.py", line 1, in <module>
    from .types import String, Integer, Boolean, Float, Double, Decimal, Time, Date, Datetime, Uriorcurie, Uri, \
        Ncname, Objectidentifier, Nodeidentifier
  File "/home/grotec/miniforge3/envs/rdf/lib/python3.13/site-packages/linkml_runtime/linkml_model/types.py", line 15, in <module>
    from linkml_runtime.utils.slot import Slot
  File "/home/grotec/miniforge3/envs/rdf/lib/python3.13/site-packages/linkml_runtime/utils/slot.py", line 2, in <module>
    from typing import Type, List, Optional, Any, re
ImportError: cannot import name 're' from 'typing' (/home/grotec/miniforge3/envs/rdf/lib/python3.13/typing.py)
make: *** [Makefile:8: docs] Error 1