lockfile issue in '00-packages' after stage 3

[Babbleshack]

CONTINUE=1 PRESERVE_CONTAINER=1 ./docker-build.sh has started failing on the package stage, with error:

[21:12:30] End /pi-gen/stage3/00-install-packages/01-run.sh
[21:12:30] End /pi-gen/stage3/00-install-packages
[21:12:30] Begin /pi-gen/stage3/01-tweaks
[21:12:30] Begin /pi-gen/stage3/01-tweaks/00-run.sh
[21:12:30] End /pi-gen/stage3/01-tweaks/00-run.sh
[21:12:30] End /pi-gen/stage3/01-tweaks
[21:12:30] End /pi-gen/stage3
[21:12:30] Begin /pi-gen/stage4
[21:12:30] Begin /pi-gen/stage4/prerun.sh
[21:12:30] End /pi-gen/stage4/prerun.sh
[21:12:30] Begin /pi-gen/stage4/00-enable-ssh
[21:12:30] Begin /pi-gen/stage4/00-enable-ssh/00-packages
E: Could not open lock file /var/lib/dpkg/lock - open (2: No such file or directory)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

I have removed the export files from stage3.

I have tried to remove my 00-enable-ssh substage, however the issue is propagated.

[XECDesign]

I think that would only happen if you're running two instanced of pi-gen at the same time, using the same files, or if you are continuing a build which was killed while dpkg was running.

[Babbleshack]

That doesnt seem to be the case. This will happen even when continuing a successful build.

[XECDesign]

In that case, could you make sure everything is unmounted, then build the full stock image from scratch and post the log (something like sudo ./build.sh |& tee build.log would work)?

EDIT: Either without using Docker or making sure you have a new unused container.