New comment by Chocimier on void-packages repository https://github.com/void-linux/void-packages/issues/35139#issuecomment-1017880382 Comment: No variables other than documented in etc/defaults.conf are expected to have effect on xbps-src. In particular, setting `XBPS_CROSS_BUILD` from config file would break building host dependencies needed for cross built packages. Your best option is to create a separate script containing `./xbps-src -a armv5tel-musl "$@"`.