Change 95187 had a related patch set uploaded by coren:
Tool Labs: Dependencies for BZ 56996

https://gerrit.wikimedia.org/r/95187

With the caveat that there is no existing upstream package for pydmtx; this will have to be built and provided by the enduser.

Change 95187 merged by coren:
Tool Labs: Dependencies for BZ 56996

https://gerrit.wikimedia.org/r/95187

This still has issues:

err: /Stage[main]/Toollabs::Exec_environ/Package[python-pysvn]/ensure: change from purged to present failed: Execution of '/usr/bin/apt-get -q -y -o DPkg::Options::=--force-confold install python-pysvn' returned 100: Reading package lists...
Building dependency tree...
Reading state information...
Package python-pysvn is a virtual package provided by:

python-svn-dbg 1.7.5-1.1
python-svn 1.7.5-1.1

E: Package 'python-pysvn' has no installation candidate

This was fixed with https://gerrit.wikimedia.org/r/#/c/96770/

To provide some context for the change: In the referenced JIRA ticket, DrTrigon requested "libraries and python bindings needed for catimages bot". No other users were involved.