Hi Ben, thanks for the additional information...
On Mi, 2016-01-20 at 15:10 +1100, Ben Finney wrote: > Control: found -1 mini-buildd/1.0.9 > Control: retitle -1 mini-buildd: fails to upgrade: Unable to change process > owner ([Errno 1] Operation not permitted) ...but I am still puzzled by this ;). Fwiw, I just sandboxed a jessie/strech upgrade without any such problems. Do you have any security (selinux,...?) hardening going on? (...) > Jan 20 15:02:29 lavender systemd[1]: Starting LSB: Start mini-buildd daemon... > Jan 20 15:02:29 lavender mini-buildd[26769]: Starting custom Debian build > daemon: mini-builddmini-buildd FAILED: Unable to change process owner ([Errno > 1] Operation not permitted) > Jan 20 15:02:29 lavender mini-buildd[26769]: failed! Could you try what -- # start-stop-daemon --start --chuid mini-buildd --exec /usr/bin/id -- (as user 'root') says an that system? If that does work fine, could you please try -- ? /usr/sbin/mini-buildd --foreground --verbose --verbose --debug=exception -- (as user 'mini-buildd')? Thanks! Stephan