How do I use abuild inside of a Distrobox container?

I want to use Alpine inside of a Distrobox container using the [alpine-toolbox-edge] image and do various tasks involving the abuild program. I followed the instructions in the ["Creating an Alpine package" article], but I quickly ran into an issue where $ abuild checksum gave me a permission denied error despite that I had added myself to the abuild group, changed owner of the /var/cache/distfiles directory, and logged out and back in. As such, I decided to check what groups I'm in and noticed that the list looked like this: $USER nobody nobody nobody nobody nobody nobody nobody (where $USER is my actual username, not $USER verbatim) As such, it seems like I haven't actually been added to the abuild group. I then tried the alternative command listed in the article, # chmod a+w /var/cache/distfiles. This made $ abuild checksum execute fine, but when I went on to run $ abuild -r to build the package I got the following error: abuild-apk: User neboula is not a member of group abuild, which is where I'm at now. How can I set up a Distrobox container where abuild actually can abuild Alpine APK packages?