BUG: undefined symbol when building Pandas with a custom python installation

[Alvaro-Kothe]

Pandas version checks

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• I have confirmed this bug exists on the main branch of pandas.

Reproducible Example

import pandas

Issue Description

When building pandas from source with a custom python installation (3.13 with debug symbols) I get an error when importing pandas.

$ python -c 'import pandas'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
    import pandas
  File "/home/user/pandas/pandas/__init__.py", line 45, in <module>
    from pandas.core.api import (
    ...<61 lines>...
    )
  File "/home/user/pandas/pandas/core/api.py", line 46, in <module>
    from pandas.core.groupby import (
    ...<2 lines>...
    )
  File "/home/user/pandas/pandas/core/groupby/__init__.py", line 1, in <modul
e>
    from pandas.core.groupby.generic import (
    ...<3 lines>...
    )
  File "/home/user/pandas/pandas/core/groupby/generic.py", line 62, in <modul
e>
    from pandas.core.apply import (
    ...<4 lines>...
    )
  File "/home/user/pandas/pandas/core/apply.py", line 19, in <module>
    from pandas._libs.internals import BlockValuesRefs
ImportError: /home/user/pandas/build/cp313d/pandas/_libs/internals.cpython-313d-x86_64-linux-gnu.so: undefined symbol: __Pyx_PyUnstable_Object_IsUniqueReferencedTemporary

And indeed the symbol is undefined:

$ nm build/cp313d/pandas/_libs/internals.cpython-313d-x86_64-linux-gnu.so | grep Unique
                 U __Pyx_PyUnstable_Object_IsUniqueReferencedTemporary

The build using my system python3.13 doesn't even have this symbol declared:

$ nm build/cp313/pandas/_libs/internals.cpython-313-x86_64-linux-gnu.so | grep Unique
<empty>

Expected Behavior

Can import pandas normally. Hence, either define the missing symbol or to don't declare it.

Installed Versions

INSTALLED VERSIONS

commit : fa5b90a
python : 3.13.9
python-bits : 64
OS : Linux
OS-release : 6.17.7-300.fc43.x86_64
Version : #1 SMP PREEMPT_DYNAMIC Sun Nov 2 15:30:09 UTC 2025
machine : x86_64
processor :
byteorder : little
LC_ALL : None
LANG : pt_BR.UTF-8
LOCALE : pt_BR.UTF-8

pandas : 3.0.0.dev0+2714.gfa5b90a079
numpy : 2.3.4
dateutil : 2.9.0.post0
pip : 25.3
Cython : 3.2.1
sphinx : 8.2.3
IPython : 9.7.0
adbc-driver-postgresql: None
adbc-driver-sqlite : None
bs4 : 4.14.2
bottleneck : 1.6.0
fastparquet : 2024.11.0
fsspec : 2025.10.0
html5lib : 1.1
hypothesis : 6.148.0
gcsfs : 2025.10.0
jinja2 : 3.1.6
lxml.etree : 6.0.2
matplotlib : 3.10.7
numba : 0.62.1
numexpr : 2.14.1
odfpy : None
openpyxl : 3.1.5
psycopg2 : 2.9.11
pymysql : 1.4.6
pyarrow : 22.0.0
pyiceberg : 0.10.0
pyreadstat : 1.3.2
pytest : 9.0.1
python-calamine : None
pytz : 2025.2
pyxlsb : 1.0.10
s3fs : 2025.10.0
scipy : 1.16.3
sqlalchemy : 2.0.44
tables : 3.10.2
tabulate : 0.9.0
xarray : 2025.10.1
xlrd : 2.0.2
xlsxwriter : 3.2.9
zstandard : 0.25.0
qtpy : None
pyqt5 : None