没想到 build 个 2.8 比 mainline 还困难, 看起来 python 3.14 有很多兼容性问题需要修，还是算了。
/build/python-pytorch/src/pytorch/torch/csrc/dynamo/cpython_defs.c:228:20: error: invalid use of incomplete typedef ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’}
228 | Py_DECREF(frame->f_funcobj);