Can't build ns-edk2.yaml with podman backend

Four months ago I set up FVP with Shrinkwrap using the Podman backend and it worked fine (I was using Shrinkwrap commit 59123992, but I don't think it's relevant because even reverting back to that commit I still get the same error).

Today I wanted to set everything up from scratch again, so I pulled to current Shrinkwrap main branch (again, probably not relevant but I'm on commit 59123992) and now I get this error:

$ export SHRINKWRAP_BUILD=$HOME/.cache/shrinkwrap/build
$ export SHRINKWRAP_PACKAGE=$HOME/.cache/shrinkwrap/package
$ ~/src/shrinkwrap/shrinkwrap --runtime=podman build --overlay=arch/v9.4.yaml ns-edk2.yaml
Trying to pull docker.io/shrinkwraptool/base-slim:latest...
Getting image source signatures
Copying blob 04ab9904ecc4 done
Copying blob fcf768f8766a done
Copying blob af107e978371 done
Copying blob 5a20a8806a4a done
Copying blob 1d1e7ea998fa done
Copying blob 2fccac044ce0 done
Copying blob b2bd1401aecc done
Copying blob 1b9c36a6810a done
Copying blob b385edfcd3c4 done
Copying blob 1094c809cc75 done
Copying blob cc00fb6f56dc done
Copying blob 35ffa681a4cb done
Copying blob 7d9114a9b740 done
Copying blob a7664a672777 done
Copying blob 4214d3b8ec80 done
Copying blob f3ac1f93f152 done
Copying blob daf5921be141 done
Copying blob a83da2af1d2a done
Copying blob 3e50448c6003 done
Copying blob 976da67c0666 done
Copying blob fdde7d7ac464 done
Copying blob e77e605d76a1 done
Copying blob 53e25d414c48 done
Copying config b685da5e7d done
Writing manifest to image destination
Storing signatures
Error: OCI runtime error: crun: mount `/home/bauermann/.local/share/containers/storage/vfs-containers/0b74951f96cc1231ced572a260e01044e47775712ee711f80e313bc078d12c5e/userdata/overlay/3157829075/merge` to `home/bauermann`: Invalid argument
RuntimePreparationFailed: Runtime preparation failed: failed to pull remote image docker.io/shrinkwraptool/base-slim:latest
$ echo $?
1

I don't know what changed from four months ago to now that could have caused this. I'm on Ubuntu 23.10 on x86_64. Podman version is 4.3.1. Tuxmake version is 1.21.5.

Perhaps the current version of the base-slim image is incompatible with Podman somehow? I'm just guessing, though.