    Obnam.backupEncrypted "/" (Cron.Times "44 2 * * *") [] Obnam.OnlyClient (Gpg.GpgKeyId "XXXXXX")

    $ propellor --spin myhost
    myhost apt installed obnam ... ok
    gpg: key XXXXXX: already in secret keyring
    gpg: Total number processed: 1
    gpg:       secret keys read: 1
    gpg:  secret keys unchanged: 1
    ** warning: user error (su ["-c","gpg --import","root"] exited 2)
    myhost / backed up by obnam ... failed
    myhost overall ... failed
    Shared connection to myhost closed.
    propellor: remote propellor failed
