libproperties/1.1.2: WARN: Build folder is dirty, removing it: /Users/jenkins/w/cci_PR-3877@4/.conan/data/libproperties/1.1.2/_/_/build/0188020dbfd167611b967ad2fa0e30710d23e920
ERROR: libproperties/1.1.2: Error in source() method, line 40
	os.rename(source_dir, self._source_subfolder)
	NameError: name 'os' is not defined