Comment 39 for bug 2020530

And for focal; again, not re-testing debootstrap of all series.

$ sudo apt install ubuntu-dev-tools
$ sg sbuild -c 'mk-sbuild --skip-proposed mantic'
Specified release (mantic) not known to debootstrap
$
# enable proposed
$ sudo apt install debootstrap
-> correctly pulls in new ubuntu-dev-tools as well due to breaks
$ sg sbuild -c 'mk-sbuild --skip-proposed mantic'
-> succeeds
$