Describe your changes. When there are two parts, one of thn with stage-packages and a transitive dependency to ca-certificates and another one with the chisel ca-certificates_data, there will be a conflict related to the file `/etc/ssl/certs/ca-certificates.crt`. See issue https://github.com/canonical/rockcraft/issues/1261 For Fastapi and Gunicorn based extensions, the problem occurs with non bare images, as they stage the package python3-venv. For expressjs, it happens in bare and non bare images (they always stage the package npm). The fix for the problematic cases is to exclude `etc/ssl/certs/ca-certificates.crt` in the part that imports the deb package with the transitive dependency for ca-certificates. --- - [x] I've followed the [contribution guidelines](https://github.com/canonical/rockcraft/blob/main/CONTRIBUTING.md). - [x] I've signed the [CLA](http://www.ubuntu.com/legal/contributors/). - [x] I've successfully run `make lint && make test`. - [x] I've added or updated any relevant documentation. - [x] In documents I changed, I [added a meta description](https://canonical-starflow.readthedocs-hosted.com/how-to/add-a-page-meta-description/) if one was missing. - [x] I've updated the relevant release notes.