org.nemo.root.policy is only in nemo package, your problem seems caused by unofficial package from webupd8 ppa. Is not a problem of official packages that can't consider any unofficial packages changes. Remove all unofficial packages before install the official ones.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1349004 Title: package nemo 2.2.3-2 failed to install/upgrade: trying to overwrite '/usr/share/polkit-1/actions/org.nemo.root.policy', which is also in package nemo-data 2.2.3-0~webupd8~trusty0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nemo/+bug/1349004/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs