If you want to compile the latest GIT version you need a computer running Linux any recent distro should work. Follow the steps below to download, compile and prepare the image from the GIT repo. Replace [board] with your actual board’s name (e.g. raspberrypi)
https://github.com/ccrisan/motioneyeos/wiki/Building-From-Source
# git clone –depth 1 https://github.com/ccrisan/motioneyeos.git motioneyeos
# cd motioneyeos
# ./build.sh [board] xconfig
# ./build.sh [board]
# ./build.sh [board] mkimage
https://github.com/ccrisan/motioneyeos/wiki/Supported-Devices