Client should exit immediately on failure

[atj@titan-ext7]$ container_builder --arch=ppc64le test.img test.def
2017-Dec-17 22:42:39 [SUCCESS] Connecting to BuilderQueue: 
2017-Dec-17 22:42:40 [SUCCESS] Requesting Builder: 
2017-Dec-17 22:42:40 [SUCCESS] Connecting to Builder: 
2017-Dec-17 22:42:40 [INFO] Sending definition: test.def

0%   10   20   30   40   50   60   70   80   90   100%
|----|----|----|----|----|----|----|----|----|----|
***************************************************
2017-Dec-17 22:42:40 [INFO] Start of Singularity builder output:
ERROR: Unknown container build Singularity recipe format: ./container.def
ABORT: Aborting with RETVAL=255
Cleaning up...
2017-Dec-17 22:42:41 [INFO] Sending finished container: test.img
2017-Dec-17 22:42:41 [INFO] Error receiving headerEnd of file
2017-Dec-17 22:42:41 [INFO] Recieved message hader not of file type
2017-Dec-17 22:42:41 [SUCCESS] Container received: test.img