pmbootstrap/docs/environment_variables.md

Environment Variables

PMB_SUDO

pmbootstrap supports doas and sudo. If multiple sudo implementations are installed, pmbootstrap will use doas. You can set the PMB_SUDO environmental variable to define the sudo implementation you want to use.

PMB_APK_FORCE_MISSING_REPOSITORIES

When this is set to 1, pmbootstrap will not complain if downloading an APKINDEX results in a 404 not found error. This is used by bpo when building a new stable repository for the first time. For example if the x86_64 repository was already built and published, but the aarch64 repository wasn't published yet.