libproperties/1.1.2: WARN: Build folder is dirty, removing it: /Users/jenkins/w/cci_PR-3877@3/.conan/data/libproperties/1.1.2/_/_/build/8bd11c0d33f92edbe0a4a9802b5aefdad8b453f5
ERROR: libproperties/1.1.2: Error in source() method, line 40
	os.rename(source_dir, self._source_subfolder)
	NameError: name 'os' is not defined