inconsistent builds between per project builds and nightlies

Recently, some packages pipelines fail when tested independently like: https://gitlab.idiap.ch/bob/bob.blitz/-/jobs/215922 and https://gitlab.idiap.ch/bob/bob.math/-/jobs/215931 but they build successfully when tested in nightlies: https://gitlab.idiap.ch/bob/nightlies/-/jobs/215787

What could be the difference here? I just noticed that nightlies still uses our old docker image. So I will change that to see that will fix this issue.