Comment # 2 on bug 1212824 from Dominique Leuenberger

(In reply to Egbert Eich from comment #1)
> Apparently, the command `apptainer build container.sif
> apptainer_container.def` died while it tried to create the squashfs. It is
> conceivable that apptainer temporarily needs some scratch space while
> creating the sif file. If space on the test system is too scares this needs
> to be remedied by QA. It is unrelated to the software.
> Assigning to Ioannis.

AS can be seen in the output of df in comment #0 we are on a 30GB disk with
2.3GB occupied. If we need more free space than that, everybody will be doomed
(only chance would be for apptainer to use /tmp which is tmpfs and < 1GB
free... but that should not have changed recently)