root@w3:/home/luca/Stage/svn/buildsystem#./efw-build jail-clean
Are you sure that you want to remove all files in jail? (y/N) y
+++ Unmounting jail directories
Traceback (most recent call last):
  File "./efw-build", line 126, in 
    do(args)
  File "./efw-build", line 97, in do
    obj.jailClean()
  File "/home/luca/Uni/Stage/svn/buildsystem/efwjail.py", line 377, in jailClean
    self.jailUnmount()
  File "/home/luca/Uni/Stage/svn/buildsystem/efwjail.py", line 357, in jailUnmount
    if not force and not self.release_lock(lockname):
  File "/home/luca/Uni/Stage/svn/buildsystem/efwjail.py", line 312, in release_lock
    self.del_lock(dirs)
  File "/home/luca/Uni/Stage/svn/buildsystem/efwjail.py", line 303, in del_lock
    remove(filename)
OSError: [Errno 2] No such file or directory: '/home/luca/Uni/Stage/svn/buildsystem/sandbox/lock/_var_lib_smart___home_luca_Uni_Stage_svn_buildsystem_sandbox_smart_data.8427'