Can't pmbootstrap generic x86_64 device with Gnome Mobile due to missing wallpapers package

Describe your issue

What's the expected behaviour?

I would like to install Gnome Mobile on a generic x86_64 device. Microsoft Surface Go.

What's the current behaviour?

pmbootstrap install fails with the log message:

WARNING: opening /mnt/pmbootstrap/packages: No such file or directory
ERROR: unable to select packages:
  postmarketos-artwork-wallpapers-gnome (no such package):
    required by: world[postmarketos-artwork-wallpapers-gnome]

How to reproduce your issue?

pmbootstrap init
# release channel 'edge'
# vendor 'generic'
# device 'x86_64'
# kernel [edge]
# User interface [gnome-mobile]
pmbootstrap init

What device are you using?

Trying to use PostmarketOS on a Microsoft Surface Go. Trying to pmbootstrap from a Lenovo Thinkpad using Manjaro with pmbootstrap v2.2.1 from their official package repos.

On what postmarketOS version did you encounter the issue?

• edge (master branch)

• v23.12

• v23.06 (supported until 2024-01-18)

• I confirm that the issue still is present after running sudo apk upgrade -a

On what environment did you encounter the issue?

Environments

• GNOME Shell on Mobile
• Phosh
• Plasma Mobile
• Sxmo (Wayland/Sway) Please post the output of sxmo_version.sh
• Other: Please fill out

How did you get postmarketOS image?

• from https://images.postmarketos.org
• I built it using pmbootstrap
• It was preinstalled on my device

What's the build date of the image? (in yyyy-mm-dd format)

Section not relevant.

Additional information

I checked the packages page of PostmarketOS for the package and it is indeed missing from 'master'. It is still present in v23.12 and prior, but I can't use that with a manual pmbootstrap of an unsupported device. https://pkgs.postmarketos.org/package/v23.06/postmarketos/x86_64/postmarketos-artwork-wallpapers-gnome

Thanks for any hints <3