confusing step order vs current setup

https://verification.f-droid.org/buildbot/#/builders/1/builds/27696

recipe: https://gitlab.com/fdroid/fdroiddata/-/blob/master/metadata/io.github.saeeddev94.xray.yml#L6763-L6800

SDK is installed as part of prebuild: in https://verification.f-droid.org/buildbot/#/builders/1/builds/27696/steps/6/logs/stdio lines 178-187

BUT some other version installed too in https://verification.f-droid.org/buildbot/#/builders/1/builds/27696/steps/8/logs/stdio lines 240-246

it's not clear which buildbot stage is for prebuild:, see NDK: eg. looking at https://verification.f-droid.org/buildbot/#/builders/1/builds/27696/steps/6/logs/stdio I see the prebuild command line being run (DEBUG: > bash -e -u -o pipefail -x -c -- sdkmanager "platforms;android-35" "build-tools;35.0.0" + sdkmanager 'platforms;android-35' 'build-tools;35.0.0')

and AFTER that WARNING: Android NDK version '27.1.12297006' could not be found! to install NDK. But this does not match current behaviour

current:

• ndk
• sudo
• prebuild
• clean
• build

(yeah, with rm, scandelete, scanignore, etc in between)

buildbot (from what I can see in logs):

• sudo
• prebuild
• ndk
• clean
• build

which might be problematic if NDK is ever needed in prebuild

that being said, I still don't know why this diff exists: https://verification.f-droid.org/unsigned/io.github.saeeddev94.xray_744.apk.diffoscope.html but the app is repro in CI and main server(!!) which indicates an issue in buildbot setup