I’m not creating any release tags since EFIDroid is more or less using a rolling-release system.
To ensure that you’re only pulling stable code just take the git revision from the version name in the playstore and use that revision for compiling.
If you prefer to not do tags, that’s fine. Its not required for apps to be included to F-Droid. Just life would be easier for us, and your app would be updated faster in F-Droid, as it doesn’t need manual intervention.
About the binary file: how can one invoke that build system? Is it possible to only build the busybox executable and nothing else?