Package: heudiconv Severity: serious Version: 0.5.3-1
heudiconv build-depends on the python-datalad binary package which in turn depends on the python-fasteners binary package, which in turn depends on the python-monotonic binary package which is no longer built by the python-monotonic source package. Furthermore Debian's goal for bullseye is to move away from python 2, not to add more new python 2 only packages. Even if python-monotonic gets reinstated I don't think this should migrate to testing in it's current form.
