libproperties/1.1.2: WARN: Build folder is dirty, removing it: C:\J\w\cci_PR-3877@2\.conan\data\libproperties\1.1.2\_\_\build\7bd6f2c3d5c4e48a75805376b58cde753392f711
ERROR: libproperties/1.1.2: Error in source() method, line 40
	os.rename(source_dir, self._source_subfolder)
	NameError: name 'os' is not defined