diff --git a/glances/plugins/plugin/model.py b/glances/plugins/plugin/model.py
index d36ddbfb..2ebcf046 100644
--- a/glances/plugins/plugin/model.py
+++ b/glances/plugins/plugin/model.py
@@ -70,8 +70,16 @@ class GlancesPluginModel(object):
         :stats_init_value: Default value for a stats item
         """
         # Build the plugin name
-        # Get second-last entry as the last one will always be 'model'
-        self.plugin_name = self.__class__.__module__.split('.')[-2]
+        _mod = self.__class__.__module__
+        _comp = _mod.split('.')
+        # Internal or external module (former prefixed by 'glances.plugins')
+        if 'glances.plugins' in _mod:
+            _ndx = 2
+        else:
+            _ndx = -2
+            
+        self.plugin_name = _comp[_ndx]
+        
         if self.plugin_name.startswith('glances_'):
             self.plugin_name = self.plugin_name.split('glances_')[1]
         logger.debug("Init {} plugin".format(self.plugin_name))
diff --git a/glances/stats.py b/glances/stats.py
index 67688127..e8c89a8c 100644
--- a/glances/stats.py
+++ b/glances/stats.py
@@ -15,7 +15,7 @@ import sys
 import threading
 import traceback
 from importlib import import_module
-import pkgutil
+import pathlib
 
 from glances.logger import logger
 from glances.globals import exports_path, plugins_path, sys_path
@@ -142,10 +142,16 @@ class GlancesStats(object):
         def get_addl_plugins(self, plugin_path):
             """ Get list of additonal plugins """
             _plugin_list = []
-            for plugin in pkgutil.walk_packages([plugin_path]):
-                # Make sure we only include top-level packages in that directory
-                if plugin.ispkg and not plugin.name.startswith('__') and plugin.module_finder.path == plugin_path:
-                    _plugin_list.append(plugin.name)
+            for plugin in os.listdir(plugin_path):
+                path = os.path.join(plugin_path, plugin)
+                if os.path.isdir(path) and not path.startswith('__'):
+                    # Poor man's walk_pkgs - can't use pkgutil as the module would be already imported here!
+                    for fil in pathlib.Path(path).glob('*.py'):
+                        if fil.is_file():
+                            with open(fil) as fd:
+                                if 'PluginModel' in fd.read():
+                                    _plugin_list.append(plugin)
+                                    break
 
             return _plugin_list
 
@@ -154,7 +160,7 @@ class GlancesStats(object):
         if config and config.parser.has_option('global', 'plugin_dir'):
             path = config.parser['global']['plugin_dir']
 
-        if args and 'plugin_dir' in args:
+        if args and 'plugin_dir' in args and args.plugin_dir:
             path = args.plugin_dir
             
         if path: