based off jbinit by tihmstar, to compile you would need Procursus binpack,
compiled with MEMO_CFVER=1800 MEMO_PREFIX=/binpack and have a dropbear.plist in binpack/Library/LaunchDaemons for the ssh server, then,
you should place the untar'd binpack into the current directory at binpack, binpack.dmg will be created from it.
used in palera1n rootless.
thanks to Serena for helping me