eller is way faster than minkus. abel is way faster than harris.

wget -q --ca-directory=/etc/ssl/ca-debian "https://people.debian.org/~infinity0/dd-porter" -O dd-porter && chmod +x dd-porter
./dd-porter -d debian/experimental -u upstream/experimental -c experimental rustc

If everything goes well you'll end up inside a shell (inside an schroot, inside tmux):

################ either ################
gbp buildpackage
################ or ################
quilt push -a && \
debian/rules build && \
fakeroot debian/rules binary
################ end ################
# hack hack
exit

Afterwards, outside schroot and/or outside tmux:

./dd-porter -x rustc
rm rustc.session # optional