DeviceAllow=/dev/pts/ptmx rw
DeviceAllow=char-pts rw
+# nspawn itself needs access to /dev/loop-control and /dev/loop, to
+# implement the --image= option. Add these here, too.
+DeviceAllow=/dev/loop-control rw
+DeviceAllow=block-loop rw
+DeviceAllow=block-blkext rw
+
[Install]
WantedBy=machines.target