libproperties/1.1.2: WARN: Build folder is dirty, removing it: /Users/jenkins/w/cci_PR-3877/.conan/data/libproperties/1.1.2/_/_/build/853c4b61e2571e98cd7b854c1cda6bc111b8b32c
ERROR: libproperties/1.1.2: Error in source() method, line 19
	os.rename(source_dir, self._source_subfolder)
	NameError: name 'os' is not defined