Got this output applying update from the post python 3.15 rawhide: 

>>> Running %triggerpostun scriptlet: fedora-third-party-0:0.10-20.fc45.noarch
>>> Finished %triggerpostun scriptlet: fedora-third-party-0:0.10-20.fc45.noarch
>>> Scriptlet output:
>>> Error in import line from /usr/lib/python3.15/site-packages/Paste-3.10.1-py3.15-nspkg.pth: imp
ort sys, types, os;p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('paste',));importlib =
 __import__('importlib.util');__import__('importlib.machinery');m = sys.modules.setdefault('paste'
, importlib.util.module_from_spec(importlib.machinery.PathFinder.find_spec('paste', [os.path.dirna
me(p)])));m = m or sys.modules.setdefault('paste', types.ModuleType('paste'));mp = (m or []) and m
.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p)
>>>   Traceback (most recent call last):
>>>     File "<frozen site>", line 533, in _exec_imports
>>>     File "<string>", line 1, in <module>
>>>   KeyError: "local variable ''sitedir'' is not defined"
>>> Error in import line from /usr/lib/python3.15/site-packages/straight.plugin-1.5.0-py3.15-nspkg
.pth: import sys, types, os;p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('straight',))
;importlib = __import__('importlib.util');__import__('importlib.machinery');m = sys.modules.setdef
ault('straight', importlib.util.module_from_spec(importlib.machinery.PathFinder.find_spec('straigh
t', [os.path.dirname(p)])));m = m or sys.modules.setdefault('straight', types.ModuleType('straight
'));mp = (m or []) and m.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p)
>>>   Traceback (most recent call last):
>>>     File "<frozen site>", line 533, in _exec_imports
>>>     File "<string>", line 1, in <module>
>>>   KeyError: "local variable ''sitedir'' is not defined"
>>> 
>>> Running %triggerin scriptlet: fedora-third-party-0:0.10-20.fc45.noarch
>>> Finished %triggerin scriptlet: fedora-third-party-0:0.10-20.fc45.noarch
>>> Scriptlet output:
>>> Error in import line from /usr/lib/python3.15/site-packages/Paste-3.10.1-py3.15-nspkg.pth: imp
ort sys, types, os;p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('paste',));importlib =
 __import__('importlib.util');__import__('importlib.machinery');m = sys.modules.setdefault('paste'
, importlib.util.module_from_spec(importlib.machinery.PathFinder.find_spec('paste', [os.path.dirna
me(p)])));m = m or sys.modules.setdefault('paste', types.ModuleType('paste'));mp = (m or []) and m
.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p)
>>>   Traceback (most recent call last):
>>>     File "<frozen site>", line 533, in _exec_imports
>>>     File "<string>", line 1, in <module>
>>>   KeyError: "local variable ''sitedir'' is not defined"
>>> Error in import line from /usr/lib/python3.15/site-packages/straight.plugin-1.5.0-py3.15-nspkg
.pth: import sys, types, os;p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('straight',))
;importlib = __import__('importlib.util');__import__('importlib.machinery');m = sys.modules.setdef
ault('straight', importlib.util.module_from_spec(importlib.machinery.PathFinder.find_spec('straigh
t', [os.path.dirname(p)])));m = m or sys.modules.setdefault('straight', types.ModuleType('straight
'));mp = (m or []) and m.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p)
>>>   Traceback (most recent call last):
>>>     File "<frozen site>", line 533, in _exec_imports
>>>     File "<string>", line 1, in <module>
>>>   KeyError: "local variable ''sitedir'' is not defined"
>>>

Reproducible: Always