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/1513b3452ef7e2a2dd5f931247c5e02edeb98cc9
ERROR: libproperties/1.1.2: Error in source() method, line 40
	os.rename(source_dir, self._source_subfolder)
	NameError: name 'os' is not defined