_wrffortran cannot be found after installing from source

pip install . runs successfully, but when importing wrf in python I get the following error:

Traceback (most recent call last):
  File "C:\Users\User\anaconda3\envs\wrfenv_rcapetest\Lib\site-packages\wrf-python\src\wrf\__init__.py", line 6, in <module>
    from . import api
  File "C:\Users\User\anaconda3\envs\wrfenv_rcapetest\Lib\site-packages\wrf-python\src\wrf\api.py", line 1, in <module>
    from .config import (xarray_enabled, disable_xarray, enable_xarray,
  File "C:\Users\User\anaconda3\envs\wrfenv_rcapetest\Lib\site-packages\wrf-python\src\wrf\config.py", line 6, in <module>
    from ._wrffortran import (fomp_enabled, fomp_set_num_threads,
ImportError: DLL load failed while importing _wrffortran: The specified module could not be found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\User\anaconda3\envs\wrfenv_rcapetest\Lib\site-packages\wrf-python\src\wrf\__init__.py", line 18, in <module>
    from . import api
  File "C:\Users\User\anaconda3\envs\wrfenv_rcapetest\Lib\site-packages\wrf-python\src\wrf\api.py", line 1, in <module>
    from .config import (xarray_enabled, disable_xarray, enable_xarray,
  File "C:\Users\User\anaconda3\envs\wrfenv_rcapetest\Lib\site-packages\wrf-python\src\wrf\config.py", line 6, in <module>
    from ._wrffortran import (fomp_enabled, fomp_set_num_threads,
ImportError: DLL load failed while importing _wrffortran: The specified module could not be found.

I'm trying to install from source so I can have more control over the calculations in the fortran scripts. I'm happy to use conda install if there's some way to manually change the fortran calculations, but I can't see that functionality.

Versions:

• OS: Windows 11
• Python 3.11.3
• numpy 1.23.5
• wrapt 1.14.1
• setuptools 67.7.2

Start with src/wrf/config.py and the _wrffortran import reached through src/wrf/init.py and api.py. Reproduce pip install . on the reported Windows and Python versions, checking whether the extension and its dependent DLLs are produced; done means importing wrf succeeds without the DLL load error.