Randomly failing image builds - what is going on?

I keep getting “Unable to build image from the repository.” in a seemingly completely random way. I.e. it fails a few times, I keep submitting eventually it works despite zero changes to code etc. and this is just wasting a lot of time.

Is this just the evaluation server being unreliable/unstable/not being able to deal with the number of people submitting at once? Can you stabilize it? Or is there some change to the original instructions that we should be aware of? Anything you can do AI-crowd team @shivam or @kelleni2?

Examples:
https://gitlab.aicrowd.com/bjoern.holzhauer/dsai-challenge-solution/issues/133
https://gitlab.aicrowd.com/bjoern.holzhauer/dsai-challenge-solution/issues/136

Hi @bjoern.holzhauer, looking into it. The error seems to be coming while apt package are being installed, I will keep you updated here.