[fix] bad hack to handle the limitation of our buildchain

moulinette/core.py

@@ -5,7 +5,6 @@ import time
 import json
 import errno
 import logging
-import psutil
 
 from importlib import import_module
 
@@ -497,6 +496,11 @@ class MoulinetteLock(object):
         return lock_pid
 
     def _is_son_of_locked(self):
+        # this is here and not at the beginning of the file to fix a bug in our
+        # debian build toolchain because it doesn't handle additional
+        # dependancies during the guilde and core.py is indirectly imported by
+        # setup.py
+        import psutil
 
         lock_pid = self._lock_PID()