diff --git a/src/calibre/debug.py b/src/calibre/debug.py
index 03d35f2e78..f2c04c0b89 100644
--- a/src/calibre/debug.py
+++ b/src/calibre/debug.py
@@ -147,8 +147,10 @@ def print_basic_debug_info(out=None):
     if out is None: out = sys.stdout
     out = functools.partial(prints, file=out)
     import platform
-    from calibre.constants import __appname__, get_version, isportable, isosx
-    out(__appname__, get_version(), 'Portable' if isportable else '')
+    from calibre.constants import (__appname__, get_version, isportable, isosx,
+                                   isfrozen)
+    out(__appname__, get_version(), 'Portable' if isportable else '',
+        'isfrozen:', isfrozen)
     out(platform.platform(), platform.system())
     out(platform.system_alias(platform.system(), platform.release(),
             platform.version()))
diff --git a/src/calibre/devices/udisks.py b/src/calibre/devices/udisks.py
index 7a536f59eb..b9ab4be498 100644
--- a/src/calibre/devices/udisks.py
+++ b/src/calibre/devices/udisks.py
@@ -5,7 +5,7 @@ __license__   = 'GPL v3'
 __copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
-import os, dbus, re
+import os, re
 
 def node_mountpoint(node):
 
@@ -25,6 +25,7 @@ class NoUDisks1(Exception):
 class UDisks(object):
 
     def __init__(self):
+        import dbus
         self.bus = dbus.SystemBus()
         try:
             self.main = dbus.Interface(self.bus.get_object('org.freedesktop.UDisks',
@@ -35,6 +36,7 @@ class UDisks(object):
             raise
 
     def device(self, device_node_path):
+        import dbus
         devpath = self.main.FindDeviceByDeviceFile(device_node_path)
         return dbus.Interface(self.bus.get_object('org.freedesktop.UDisks',
                         devpath), 'org.freedesktop.UDisks.Device')
@@ -73,6 +75,7 @@ class UDisks2(object):
     DRIVE = 'org.freedesktop.UDisks2.Drive'
 
     def __init__(self):
+        import dbus
         self.bus = dbus.SystemBus()
         try:
             self.bus.get_object('org.freedesktop.UDisks2',