Rollback in binpatchng

Every binpatchng package as an embedded plist and installer script

The plist is used to archive the previous files in /var/db/binpatch/

Want to rollback a patch? Just pkg_delete(1) it

    OpenBSD_43 # pkg_delete binpatch-4.3-i386-001     
    binpatch-4.3-i386-001: complete 


Rollback does eat a bit of disk space, but disk space is cheap