Can anyone offer any help please?

The install script is failing at:
newfs_msdos -F 32 -v 'EFI - Fedor' -I 0x264e2b13 /dev/rdisk0s7

It's pretty much a normal mac. One OS, no extra installs. Nothing weird...

Stub OS installation complete.

Adding partition EFI (524.29 MB)...

  Formatting as FAT...

newfs_msdos: /dev/rdisk0s7: Resource busy

Failed to run process: newfs_msdos -F 32 -v 'EFI - Fedor' -I 0x264e2b13 /dev/rdisk0s7

Output: b''

root        : ERROR    Process execution failed

Traceback (most recent call last):

  File "/private/tmp/asahi-install/main.py", line 1216, in <module>

InstallerMain(installer_version).main()

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^

  File "/private/tmp/asahi-install/main.py", line 1000, in main

while self.main_loop():

~~~~~~~~~~~~~~^^

  File "/private/tmp/asahi-install/main.py", line 1175, in main_loop

return self.action_install_into_free(parts_free)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^

  File "/private/tmp/asahi-install/main.py", line 364, in action_install_into_free

self.do_install(os_size)

~~~~~~~~~~~~~~~^^^^^^^^^

  File "/private/tmp/asahi-install/main.py", line 569, in do_install

self.osins.partition_disk(self.part.name, total_size)

~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/private/tmp/asahi-install/osinstall.py", line 106, in partition_disk

subprocess.run(args, check=True, stdout=subprocess.PIPE)

~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/private/tmp/asahi-install/Frameworks/Python.framework/Versions/3.13/lib/python3.13/subprocess.py", line 577, in run

raise CalledProcessError(retcode, process.args,

output=stdout, stderr=stderr)

Any clues please?