Comment 2 for bug 2045336

What version of ubuntu-pi-arm64.yaml did you use?

I tried to reproduce and encountered another error at the `perform_manual_customization` step, using the recently modified one from the ubuntu/noble branch, so I cannot reproduce yet.

$ sudo ubuntu-image -v classic -w workdir/ -O output/ ubuntu-images/ubuntu-pi-arm64.yaml
[...]
[16] perform_manual_customization
Executing command "/usr/sbin/chroot /home/paul/scratch/debug/chroot /usr/sbin/oem-config-prepare"
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
Created symlink /etc/systemd/system/oem-config.target.wants/oem-config.service → /lib/systemd/system/oem-config.service.
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
The unit files have no installation config (WantedBy=, RequiredBy=, Also=,
Alias= settings in the [Install] section, and DefaultInstance= for template
units). This means they are not meant to be enabled or disabled using systemctl.

Possible reasons for having this kind of units are:
• A unit may be statically enabled by being symlinked from another unit's
  .wants/ or .requires/ directory.
• A unit's purpose may be to act as a helper for some other unit which has
  a requirement dependency on it.
• A unit may be started when needed via activation (socket, path, timer,
  D-Bus, udev, scripted systemctl call, ...).
• In case of template units, the unit is meant to be enabled with some
  instance name specified.
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
Created symlink /etc/systemd/system/default.target → /lib/systemd/system/oem-config.target.
sudo: unknown user oem
sudo: error initializing audit plugin sudoers_audit
duration: 318.843115ms
Error: Error running script "/usr/sbin/chroot /home/paul/scratch/debug/chroot /usr/sbin/oem-config-prepare". Error is exit status 1. Full output below:
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
Created symlink /etc/systemd/system/oem-config.target.wants/oem-config.service → /lib/systemd/system/oem-config.service.
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
The unit files have no installation config (WantedBy=, RequiredBy=, Also=,
Alias= settings in the [Install] section, and DefaultInstance= for template
units). This means they are not meant to be enabled or disabled using systemctl.

Possible reasons for having this kind of units are:
• A unit may be statically enabled by being symlinked from another unit's
  .wants/ or .requires/ directory.
• A unit's purpose may be to act as a helper for some other unit which has
  a requirement dependency on it.
• A unit may be started when needed via activation (socket, path, timer,
  D-Bus, udev, scripted systemctl call, ...).
• In case of template units, the unit is meant to be enabled with some
  instance name specified.
⚠️ /proc/ is not mounted. This is not a supported mode of operation. Please fix
your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.
Your mileage may vary.
Created symlink /etc/systemd/system/default.target → /lib/systemd/system/oem-config.target.
sudo: unknown user oem
sudo: error initializing audit plugin sudoers_audit