>``` >E: Unable to locate package libc-client2007e-dev >``` Since the default tags of the `php` images (like `php:8.3-apache` and `php:8.3-fpm`) have moved to Debian Trixie (https://github.com/docker-library/php/pull/1596), the Debian-based `postfixadmin` images have been failing to build. This is because the `libc-client2007e-dev` package is no longer available and its [source package](https://packages.debian.org/source/bookworm/uw-imap) has been removed (because it is unmaintained in Debian). The solution that keeps the `imap` extension is to switch the `FROM` lines to be more specific to stay on the older Debian release. This will work until the Bookworm-based `php` images are no longer supported at the next Debian release, Forky (in a few years). - `php:8.3-apache` -> `php:8.3-apache-bookworm` - `php:8.3-fpm` -> `php:8.3-fpm-bookworm` I think the upcoming 4.0 release would allow the move to Debian Trixie since it dropped php imap support (https://github.com/postfixadmin/postfixadmin/issues/812). related: - https://github.com/docker-library/php/issues/1608