[NTG-context] Standalone graphics

All, If you have: \starttext \startMPpage metapost code \stopMPpage \startMPpage metapost code \stopMPpage \startMPpage metapost code \stopMPpage \startMPpage metapost code \stopMPpage \stoptext Is there a way to change all four output files directly to pdf without invoking a separate run of mptopdf?