Run of bullseye-backports for janus

Try this locally package):

debcheckout janus
cd janus
DEB_UPDATE_CHANGELOG=auto deb-auto-backport --target-release=bullseye
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Building dependency tree...
Reading state information...
Execute external solver...
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:
 sbuild-build-depends-dose3-dummy : Depends: dose-distcheck but it is not going to be installed
E: Sub-process aspcud received signal 9.
apt-get failed.
Package installation failed
Not removing build depends: cloned chroot in use
E: Failed to explain bd-uninstallable

Full worker log Full build log