diff --git a/autoinstall-schema.json b/autoinstall-schema.json
index cb6c4976..8ed8ba98 100644
--- a/autoinstall-schema.json
+++ b/autoinstall-schema.json
@@ -307,6 +307,9 @@
         "apt": {
             "type": "object",
             "properties": {
+                "version": {
+                    "type": "integer"
+                },
                 "preserve_sources_list": {
                     "type": "boolean"
                 },
diff --git a/examples/autoinstall-apt-legacy.yaml b/examples/autoinstall-apt-legacy.yaml
new file mode 100644
index 00000000..9a71379b
--- /dev/null
+++ b/examples/autoinstall-apt-legacy.yaml
@@ -0,0 +1,69 @@
+version: 1
+early-commands:
+  - echo a
+  - sleep 1
+  - echo a
+locale: en_GB.UTF-8
+refresh-installer:
+  update: yes
+  channel: edge
+network:
+  version: 2
+  ethernets:
+    all-eth:
+      match:
+        name: "en*"
+      dhcp6: yes
+debconf-selections: eek
+apt:
+  primary:
+    - arches: [default]
+      uri: "http://mymirror.local/repository/Apt/ubuntu/"
+  disable_components:
+    - non-free
+    - restricted
+  preferences:
+    - {package: "python3-*", pin: "origin *ubuntu.com*", pin-priority: 200}
+    - {package: "python-*", pin: "origin *ubuntu.com*", pin-priority: -1}
+packages:
+  - package1
+  - package2
+late-commands:
+  - echo late
+  - sleep 1
+  - echo late
+error-commands:
+  - echo OH NOES
+  - sleep 5
+  - echo OH WELL
+keyboard:
+  layout: gb
+identity:
+  realname: ''
+  username: ubuntu
+  password: '$6$wdAcoXrU039hKYPd$508Qvbe7ObUnxoj15DRCkzC3qO7edjH0VV7BPNRDYK4QR8ofJaEEF2heacn0QgD.f8pO8SNp83XNdWG6tocBM1'
+  hostname: ubuntu
+snaps:
+  - name: etcd
+    channel: 3.2/stable
+updates: all
+timezone: Pacific/Guam
+ubuntu-pro:
+  # Token that passes the basic format checking but is invalid (i.e. contains more than 16 bytes of random data)
+  token: C1NWcZTHLteJXGVMM6YhvHDpGrhyy7
+storage:
+  config:
+  - {type: disk, ptable: gpt, path: /dev/vdb, wipe: superblock, preserve: false, grub_device: true, id: disk-1}
+  - {type: disk, ptable: gpt, path: /dev/vdc, wipe: superblock, preserve: false, grub_device: true, id: disk-2}
+  - {type: partition, device: disk-1, size: 1M, wipe: superblock, flag: bios_grub, number: 1, preserve: false, id: partition-grub-1}
+  - {type: partition, device: disk-2, size: 1M, wipe: superblock, flag: bios_grub, number: 1, preserve: false, id: partition-grub-2}
+  - {type: partition, device: disk-1, size: 1G, wipe: superblock, number: 2, preserve: false, id: partition-boot-1}
+  - {type: partition, device: disk-2, size: 1G, wipe: superblock, number: 2, preserve: false, id: partition-boot-2}
+  - {type: partition, device: disk-1, size: 17%, wipe: superblock, number: 3, preserve: false, id: partition-system-1}
+  - {type: partition, device: disk-2, size: 17%, wipe: superblock, number: 3, preserve: false, id: partition-system-2}
+  - {type: raid, name: md0, raidlevel: raid1, devices: [partition-boot-1, partition-boot-2], preserve: false, id: raid-boot}
+  - {type: raid, name: md1, raidlevel: raid1, devices: [partition-system-1, partition-system-2], preserve: false, id: raid-system}
+  - {type: format, fstype: ext4, volume: raid-boot, preserve: false, id: format-boot}
+  - {type: format, fstype: ext4, volume: raid-system, preserve: false, id: format-system}
+  - {type: mount, device: format-system, path: /, id: mount-system}
+  - {type: mount, device: format-boot, path: /boot, id: mount-boot, options: 'errors=remount-ro'}
diff --git a/examples/autoinstall.yaml b/examples/autoinstall.yaml
index 9a71379b..8a6f2a38 100644
--- a/examples/autoinstall.yaml
+++ b/examples/autoinstall.yaml
@@ -16,9 +16,11 @@ network:
       dhcp6: yes
 debconf-selections: eek
 apt:
+  version: 2
   primary:
-    - arches: [default]
-      uri: "http://mymirror.local/repository/Apt/ubuntu/"
+    - uri: http://mymirror.local/repository/Apt/ubuntu/
+    - country-mirror
+    - uri: http://archive.ubuntu.com/ubuntu
   disable_components:
     - non-free
     - restricted
diff --git a/subiquity/server/controllers/mirror.py b/subiquity/server/controllers/mirror.py
index a20fdac3..be61afc4 100644
--- a/subiquity/server/controllers/mirror.py
+++ b/subiquity/server/controllers/mirror.py
@@ -60,6 +60,7 @@ class MirrorController(SubiquityController):
     autoinstall_schema = {  # This is obviously incomplete.
         'type': 'object',
         'properties': {
+            'version': {'type': 'integer'},
             'preserve_sources_list': {'type': 'boolean'},
             'primary': {'type': 'array'},
             'geoip':  {'type': 'boolean'},