Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
1: ERROR: test_do_transaction (tests.api.test_dnf_base.DnfBaseApiTest.test_do_transaction)
1: ----------------------------------------------------------------------
1: Traceback (most recent call last):
1:   File "/builddir/build/BUILD/dnf-4.18.2/tests/api/test_dnf_base.py", line 174, in test_do_transaction
1:     self.base.do_transaction(display=None)
1:   File "/builddir/build/BUILD/dnf-4.18.2/dnf/base.py", line 951, in do_transaction
1:     self._moduleContainer.save()
1:   File "/usr/lib64/python3.12/site-packages/libdnf/module.py", line 1241, in save
1:     return _module.ModulePackageContainer_save(self)
1:            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
1: libdnf._error.Error: Failed to create directory "/etc/dnf/modules.d": 13 - Permission denied
Here you can see the actual test failure.