Bookworm images not being built

Description

Since 2026-01-18, Bookworm image jobs are failing.

Building dependency tree...
Reading state information...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
 tor : Depends: libc6 (>= 2.38) but 2.36-9+deb12u13 is to be installed
       Depends: libevent-2.1-7t64 (>= 2.1.8-stable) but it is not installable
       Depends: libssl3t64 (>= 3.0.0) but it is not installable
       Depends: libzstd1 (>= 1.5.5) but 1.5.4+dfsg2-5 is to be installed
       Recommends: logrotate but it is not going to be installed
       Recommends: tor-geoipdb but it is not going to be installed
       Recommends: torsocks but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
subprocess exited with status 100
subprocess exited with status 100
Error: building at STEP "RUN apt-get update &&     apt-get install -y     deb.torproject.org-keyring     tor basez     && rm -rf /var/lib/apt/lists/*": exit status 100

Tasks

• Find you why the images are not being built:
  • Run tests locally in fresh virtual machines:
    • Podman build (bookworm with TPA image). Same issue.
    • Podman build (bookworm-backports with TPA image). Same issue.
    • Podman build (bookworm with docker.io image). Same issue.
    • Manual installation in a fresh bookworm virtual machine. Works.
    • Testing without the upstream Tor deb repository. Works.
    • Manual installation in a fresh container. Works.
• Apply a fix, or report upstream.

Time estimation

• Complexity: small (1 day)
• Uncertainty: low (x1.1)
• Reference (adapted)