On Sat, Aug 25, 2018 at 07:52:28AM +0200, Johannes Schauer wrote: > Santiago, how were you able to reproduce the issue?
My building environment is described here: https://people.debian.org/~sanvila/my-building-environment.txt but to summarize: I'm using single-CPU KVM virtual machines running Debian stable, with sbuild and schroot. I'm using the "default" profile of schroot, so the contents of this file applies: /etc/schroot/default/fstab I believed the following line could be relevant, it says that /tmp in the chroot is bind-mounted from /tmp in the host machine: /tmp /tmp none rw,bind 0 0 But unfortunately, commenting out the line does not make the problem to disapear. I guess I could prepare a virtual machine for any of you to reproduce the problem (please contact me privately for details). Thanks.

