--- a/src/pyams_content/component/theme/zmi/manager.py	Wed Apr 11 16:44:46 2018 +0200
+++ b/src/pyams_content/component/theme/zmi/manager.py	Wed Apr 11 16:46:31 2018 +0200
@@ -19,15 +19,16 @@
 from pyams_content.component.theme.interfaces import IThemesManagerTarget, IThemesManager
 from pyams_content.interfaces import MANAGE_TOOL_PERMISSION
 from pyams_skin.layer import IPyAMSLayer
-from pyams_utils.interfaces import VIEW_SYSTEM_PERMISSION
 from pyams_utils.interfaces.data import IObjectData
 from pyams_zmi.interfaces.menu import IPropertiesMenu
 from pyams_zmi.layer import IAdminLayer
 
 # import packages
+from pyams_content.skin import pyams_content
 from pyams_form.form import AJAXEditForm
 from pyams_pagelet.pagelet import pagelet_config
 from pyams_skin.viewlet.menu import MenuItem
+from pyams_utils.fanstatic import get_resource_path
 from pyams_viewlet.viewlet import viewlet_config
 from pyams_zmi.form import AdminDialogEditForm
 from pyramid.view import view_config
@@ -53,6 +54,8 @@
 class ThemesManagerEditForm(AdminDialogEditForm):
     """Themes manager edit form"""
 
+    prefix = 'manager_themes.'
+
     legend = _("Selected themes")
 
     fields = field.Fields(IThemesManager)
@@ -63,11 +66,12 @@
         super(ThemesManagerEditForm, self).updateWidgets(prefix)
         if 'extract_name' in self.widgets:
             widget = self.widgets['extract_name']
-            widget.object_data = {'ams-plugins': 'pyams_content',
-                                  'ams-plugin-pyams_content-src':
-                                      '/--static--/pyams_content/js/pyams_content{MyAMS.devext}.js',
-                                  'ams-plugin-pyams_content-callback': 'PyAMS_content.themes.initExtracts',
-                                  'ams-plugin-pyams_content-async': 'false'}
+            widget.object_data = {
+                'ams-plugins': 'pyams_content',
+                'ams-plugin-pyams_content-src': get_resource_path(pyams_content),
+                'ams-plugin-pyams_content-callback': 'PyAMS_content.themes.initExtracts',
+                'ams-plugin-pyams_content-async': 'false'
+            }
             alsoProvides(widget, IObjectData)