From my observations – rebuild is triggered by changing environment variables on Host!!!
So when I install some app into system and it adds new location in path, it triggers rebuild.
Rebuilds after some header was changed in engine is legit. But env is ridiculous.
I don’t get it, why it have to rebuild everithing if env change don’t produce new defines from build scripts?
I gota try solution with “InstalledBuild.txt”