dpkg: unrecoverable fatal error, aborting:

unable to install updated status of `libnspr4:armhf': Not a directory 
E
: 
Sub-process /usr/bin/dpkg returned an error code (2) 
Command returned 100: schroot -u root -c source:click-ubuntu-sdk-15.04-armhf -- /finish.sh 
Traceback (most recent call last): File "/usr/bin/click", line 86, in sys.exit(main()) File "/usr/bin/click", line 82, in main return mod.run(args) File "/usr/lib/python3/dist-packages/click/commands/chroot.py", line 266, in run return args.func(parser, args) File "/usr/lib/python3/dist-packages/click/commands/chroot.py", line 68, in create return chroot.create(args.keep_broken_chroot) File "/usr/lib/python3/dist-packages/click/chroot.py", line 554, in create self.full_name, ret_code)) click.chroot.ClickChrootException: Failed to create chroot 'click-ubuntu-sdk-15.04-armhf' (exit status 100) 
There was an error creating the click target, cleaning up 
click target was removed successfully 
---Click exited with errors, please check the output---