Dependency libcrypto++6 out of date in Debian 12 testing (bookworm) deb packages

Hi! The urbackup server’s latest Debian packages (version 2.4.15) for testing and sid currently depend on package “libcrypto+6”, however Debian has upgraded the major version of this library to 8. Now the package available in Debian testing is “libcrypto+8”. This prevents me from installing them, tried with both testing and unstable package versions.

$ cat /etc/issue
Debian GNU/Linux bookworm/sid \n \l

$ curl -O
% Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
Dload  Upload   Total   Spent    Left  Speed
100 3438k  100 3438k    0     0  1930k      0  0:00:01  0:00:01 --:--:-- 1931k

$ sudo apt install ./urbackup-server_2.4.15_amd64.deb 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'urbackup-server' instead of './urbackup-server_2.4.15_amd64.deb'
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:
urbackup-server : Depends: libcrypto++6 but it is not installable
Recommends: libguestfs-tools but it is not going to be installed
Recommends: qemu-utils but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

$ apt-cache search 'libcrypto++'
libcrypto-equality-clojure - Clojure library protecting against timing attacks
libcrypto-random-clojure - secure random generator for Clojure
libcryptokit-ocaml - cryptographic algorithm library for OCaml - runtime
libcryptokit-ocaml-dev - cryptographic algorithm library for OCaml - development
libcryptominisat5-5.8 - SAT solver library
libcryptominisat5-dev - development files for the CryptoMiniSat SAT solver
libcrypto+-dev - General purpose cryptographic library - C+ development
libcrypto++-doc - General purpose cryptographic library - documentation
libcrypto++-utils - General purpose cryptographic library - utilities and data files
libcrypto++8 - General purpose cryptographic library - shared library
libssl-dev - Secure Sockets Layer toolkit - development files
libssl-doc - Secure Sockets Layer toolkit - development documentation
libssl1.1 - Secure Sockets Layer toolkit - shared libraries
libssl3 - Secure Sockets Layer toolkit - shared libraries
r-cran-openssl - GNU R toolkit for encryption, signatures and certificates based on OpenSSL

Who builds the Debian packages for urbackup? They are 8 months old, life has moved on. I’d be happy to help the package maintainers, but I’d need to see the package build scripts and documentation.