..ts/Libraries/perl6/rakudo-star-2017.07 % perl Configure.pl --prefix=/usr/local/Cellar/rakudo-star/2017.07 --backends=moar,jvm --gen-nqp --gen-moar --make-install
Warning: JVM backend does not yet support all modules
Building NQP ...
perl Configure.pl --prefix=/usr/local/Cellar/rakudo-star/2017.07 --backends=moar,jvm --make-install

Creating tools/build/install-jvm-runner.pl ...
got: java version "9"
Using java version "9"

Cleaning up ...
perl -MExtUtils::Command -e mkpath gen/moar/stage1/gen