Do not arbitrarily remove part dir. Add it to the path of dirs to delete

slapos/recipe/build.py

@@ -300,9 +300,7 @@ class Script:
         self._checkPromise('slapos_promise', self.options['location'])
       except Exception:
         if os.path.exists(self.options['location']):
-          self.logger.info('Removing location %r because of error' %
-            self.options['location'])
-          shutil.rmtree(self.options['location'])
+          self.cleanup_dir_list.append(self.options['location'])
         raise
     finally:
       for d in self.cleanup_dir_list: