Here is a working SD card image for installing Arch Linux on an OrangePi Zero. It basically follows [this excellent build guide][build-guide] but can save you a lot of time if you just want to get an image up an running, especially with getting the ethernet support to work.
Once the system is working, use `fdisk /dev/mmcblk0` ([fdisk][fdisk]) as root to resize the partition. Press `d` to delete the current partition, then press `n` to create a new partition, and press `Enter` 4 times to accept the defaults. fdisk will give you defaults that work and make the partition as big as possible. Then answer `N` when fdisk asks about removing the existing ext4 signature.
The linux kernel is pinned to version 4.13-rc7 in this image. This is unfortunate but is required in order to keep the ethernet support working, as newer versions break it at the time of writing. If you try a newer kernel and get it to work, please notify me.