=> "/opt/pkg/bin/bmake" ["-C", "/data/jenkins/workspace/pkgsrc-upstream-trunk/math/prng", "all", "BATCH=1", "DEPENDS_TARGET=/nonexistent", "WRKLOG=/data/bob/db/logs/prng-3.0.2/work.log"]
===> Building for prng-3.0.2
bmake: argument '0' to option '-j' must be a positive number
*** Error code 2

Stop.
bmake[1]: stopped making "all" in /data/jenkins/workspace/pkgsrc-upstream-trunk/math/prng
*** Error code 1

Stop.
bmake: stopped making "all" in /data/jenkins/workspace/pkgsrc-upstream-trunk/math/prng