m1n1 update fails with "SameFileError: '.../AdminUserRecoveryInfo.plist' and '.../AdminUserRecoveryInfo.plist' are the same file"

[rlue]

Tried to update m1n1 on my 2020 M1 Mac Mini, running Asahi + nixOS. Ran into the following exception:

Traceback (most recent call last):
  File "/System/Volumes/Data/private/tmp/asahi-install/main.py", line 1149, in <module>
    InstallerMain(installer_version).main()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/System/Volumes/Data/private/tmp/asahi-install/main.py", line 946, in main
    while self.main_loop():
          ~~~~~~~~~~~~~~^^
  File "/System/Volumes/Data/private/tmp/asahi-install/main.py", line 1116, in main_loop
    return self.action_repair_or_upgrade(oses_upgradable, upgrade=True)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/System/Volumes/Data/private/tmp/asahi-install/main.py", line 414, in action_repair_or_upgrade
    self.ins.repair(self.cur_os)
    ~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "/System/Volumes/Data/private/tmp/asahi-install/stub.py", line 196, in repair
    self.copy_admin_users(cur_os)
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
  File "/System/Volumes/Data/private/tmp/asahi-install/stub.py", line 179, in copy_admin_users
    shutil.copy(admin_users, tg_admin_users)
    ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/System/Volumes/Data/private/tmp/asahi-install/Frameworks/Python.framework/Versions/3.13/lib/python3.13/shutil.py", line 428, in copy
    copyfile(src, dst, follow_symlinks=follow_symlinks)
    ~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/System/Volumes/Data/private/tmp/asahi-install/Frameworks/Python.framework/Versions/3.13/lib/python3.13/shutil.py", line 240, in copyfile
    raise SameFileError("{!r} and {!r} are the same file".format(src, dst))
shutil.SameFileError: '/Volumes/Preboot/45A7F00D-EC71-4981-8CEE-F1C6C5EB1D63/var/db/AdminUserRecoveryInfo.plist' and '/Volumes/Preboot/45A7F00D-EC71-4981-8CEE-F1C6C5EB1D63/var/db/AdminUserRecoveryInfo.plist' are the same file

Full installer log (gist)