SSD running out of space: O2 out of control?

Good evening,
this is not strictly related to the build process itself, but to the size of the O2 directory itself. After this time’s build, the space required increased by 10 GB! I am doing what I can with SSD management but I am hitting a limit (e.g. 35 GB O2, 25 GB old aliPhysics measurements). Is it possible to reduce the size needed for O2? What I mean is that this change in one month by more than 10GB sounds suspicious…

You can try to run aliBuild clean, or even aliBuild clean --aggressive-cleanup.