[Python] get_include() gives wrong directory in conda environment

def get_include():
    """
    Return absolute path to directory containing Arrow C++ include
    headers. Similar to numpy.get_include
    """
    return _os.path.join(_os.path.dirname(__file__), 'include') 

/path/to/myconda/envs/envname/lib/python3.8/site-packages/pyarrow/include

$ echo $CONDA_PREFIX
/path/to/myconda/envs/envname

$ ls $CONDA_PREFIX/include/arrow | head
adapters
api.h
array
array.h
buffer_builder.h
buffer.h
builder.h
c
chunked_array.h
chunk_resolver.h