How to get the stable version via the client:
pip install cbench
cb download program:milepost-codelet-mibench-office-ghostscript-src-gdevpbm-codelet-1-1 --version=1.0.0 --all
ck run program:milepost-codelet-mibench-office-ghostscript-src-gdevpbm-codelet-1-1