Eu tive um problema como segue:
>Checking build tools versions...
>************************************************************
>You asked for an OpenJDK based build but your version is
>java version "1.8.0_161" Java(TM) SE Runtime Environment (build 1.8.0_161-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode).
>************************************************************
>build/core/main.mk:175: error: stop.
>09:36:38 ckati failed with: exit status 1
>build/core/main.mk:21: recipe for target 'run_soong_ui' failed
>make: *** [run_soong_ui] Error 1
>#### make failed to build some targets (01:40 (mm:ss)) ####
O problema foi resolvido para mim removendo o caminho do Oracle de $ EXPORT.