$ sudo rpm-ostree upgrade
1 metadata, 0 content objects fetched; 569 B transferred in 1 seconds
Checking out tree 55e64ae... done
Enabled rpm-md repositories: fedora updates
Updating metadata for 'fedora': [=============] 100%
rpm-md repo 'fedora'; generated: 2018-10-24T22:20:15Z
Updating metadata for 'updates': [=============] 100%
rpm-md repo 'updates'; generated: 2018-11-19T21:29:40Z
Importing metadata [=============] 100%
Resolving dependencies... done
Checking out packages (97/97) [=============] 100%
Running pre scripts... 3 done
Running post scripts... 25 done
Writing rpmdb... done
Writing OSTree commit... done
Staging deployment... error: Cleaning deployments: unlinkat: Operation not permitted