build: now that cmdfiles can fail, exit gently
build: now that cmdfiles can fail, exit gently

arifogel/batfish,dhalperi/batfish,intentionet/batfish,batfish/batfish,intentionet/batfish,intentionet/batfish,arifogel/batfish,dhalperi/batfish,intentionet/batfish,intentionet/batfish,batfish/batfish,dhalperi/batfish,batfish/batfish,arifogel/batfish