[BUG]: `make iso` is failing

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Current Behavior

`make iso` on fresh install fails

make image has successful output:
```
[2/2] STEP 6/6: RUN bootc container lint
Checks passed: 13
Checks skipped: 1
[2/2] COMMIT localhost/myimage
--> 58e87bac5884
Successfully tagged localhost/myimage:latest
58e87bac588478273f470723709bbbf501c78afd519b7e3ceb3f44735e605340
```

`make iso` has failed output, no image gets built:
```
sudo podman run \
--rm \
-it \
--privileged \
--pull=newer \
--security-opt label=type:unconfined_t \
-v ./output:/output \
-v ./output/config.toml:/config.toml:ro \
-v /var/lib/containers/storage:/var/lib/containers/storage \
quay.io/centos-bootc/bootc-image-builder:latest \
--type iso \
--use-librepo=$LIBREPO \
--progress verbose \
localhost/myimage
Generating manifest manifest-iso.json
Manifest generation step
2026/06/08 01:29:42 error: cannot build manifest: mounting localhost/myimage container failed: exit status 125
stderr:
Error: no container with name or ID "35f44b832ee11afc9c2049362780cde863e9a1a6de20c380aeb9c78dd506fdcd" found: no such container
make[1]: *** [Makefile:33: bib_image] Error 1
make[1]: Leaving directory '/home/me/path/to/this'
make: *** [Makefile:62: iso] Error 2
```

### Expected Behavior

An iso builds in the output folder. This does not happen

### Steps To Reproduce

1. Fresh install on main branch at time of this writing
2. `podman version 5.8.2` on Fedora
3. Run `make image` -- success, then `make iso` -- failure from above

### Anything else?

_No response_

### Search terms

make iso fail no such container