Hi, I just tried to, but could not reproduce your error. I'm able to update my package lists in my freshly created build environment and just build a sample python snap for arm64. First: Please be sure that your proxy tool (e.g. Px) is running on your host at port 3128. (Use Px as Local Proxy on a Windows Host) But from the messages you sent, I would guess that the problems are not with your local settings but with the ubuntu mirror, from where you try to access the package lists. The Ubuntu mirror used in '/etc/apt/sources.list' may be overloaded, this can sometimes be the case. So I would just recommend you to try 'sudo apt update' again. If the ubuntu mirror is not available for a longer time, you could change the country code in the sources list to switch to another ubuntu mirror (e.g. from “de” to “ch”). See more information in german here. Best regards, Nick
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