libproperties/1.1.2: WARN: Build folder is dirty, removing it: /Users/jenkins/w/cci_PR-3877@2/.conan/data/libproperties/1.1.2/_/_/build/5fed66895e5b85fca4af6ac05bb157e1ffecb806
ERROR: libproperties/1.1.2: Error in source() method, line 19
	os.rename(source_dir, self._source_subfolder)
	NameError: name 'os' is not defined