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: 
E   ModuleNotFoundError: No module named 'tests.x509'
The test module tests/hazmat/primitives/test_pkcs7.py is trying to import something from tests.x509, but that module can't be found. This suggests a problem with the structure of the cryptography source code within the build environment.