How to exclude paths from being extracted when extracting an iso using xorriso

As an example I'm trying to extract all the files from the ubuntu live iso **except** the path /casper/filesystem.squashfs. According to the man page:

Normally  xorriso  only writes to disk files which were given as stdio:
       pseudo-drives or as log files.  But its alter ego osirrox  is  able  to
       extract  file  objects  from  ISO  images  and to create, overwrite, or
       delete file objects on disk.
       Disk file exclusions by -not_mgt, -not_leaf, -not_paths apply.

I can extract all paths on the iso fine using:

xorriso -osirrox on -indev ubuntu-21.04-desktop-amd64.iso -extract / extract_dir

But I've been attempting to use the disk file exclusions but to no avail. I've tried different variations or not_leaf and not_paths in different orders both before and after the -extract action. They all extract all paths. Here's a few that I've tried. Using not_leaf:

xorriso -osirrox on -indev ubuntu-21.04-desktop-amd64.iso -not_leaf 'filesystem.squashfs' -extract / extracted_dir
xorriso -osirrox on -indev ubuntu-21.04-desktop-amd64.iso -extract / extracted_dir -not_leaf 'filesystem.squashfs'
xorriso -osirrox on -indev ubuntu-21.04-desktop-amd64.iso -not_mgt on -not_leaf 'filesystem.squashfs' -extract / extracted_dir
xorriso -osirrox on -indev ubuntu-21.04-desktop-amd64.iso -not_mgt on -extract / extracted_dir -not_leaf 'filesystem.squashfs'

Using not_paths with reorderings as above:

xorriso -osirrox on -indev ubuntu-21.04-desktop-amd64.iso -not_mgt on -not_paths 'casper/filesystem.squashfs' -- -extract / extracted_dir
xorriso -osirrox on -indev ubuntu-21.04-desktop-amd64.iso -not_mgt on -not_paths '/casper/filesystem.squashfs' -- -extract / extracted_dir
xorriso -osirrox on -indev ubuntu-21.04-desktop-amd64.iso -not_mgt on -not_paths 'extracted_dir/casper/filesystem.squashfs' -- -extract / extracted_dir

I would accept an answer with not_leaf or not_paths, but would prefer both. And an explanation of the logic behind how this is supposed to work (ie why am I not getting it?) would be nice.