make THREADS configurable through environment
make THREADS configurable through environment

hoehnp/sirius,hoehnp/sirius,claritylab/sirius,hoehnp/sirius,claritylab/sirius,hoehnp/sirius,claritylab/sirius,claritylab/sirius,claritylab/sirius,hoehnp/sirius,claritylab/sirius,hoehnp/sirius,claritylab/sirius,hoehnp/sirius