net/mpich2 was marked MAKE_JOBS_UNSAFE while at v1.1.1p1 in r244447. According to mpich2 wiki FAQ[1], this issue was fixed since v1.5a1. Ports version is v1.5_3,5 now, so it probably worth giving it another try. [1]: https://wiki.mpich.org/mpich/index.php/Frequently_Asked_Questions#Q:_The_build_fails_when_I_use_parallel_make.
Thanks for the notification! It builds fine in my poudriere, let's see its behaviour on the packages cluster.
A commit references this bug: Author: thierry Date: Fri Mar 4 21:36:16 UTC 2016 New revision: 410150 URL: https://svnweb.freebsd.org/changeset/ports/410150 Log: Remove MAKE_JOBS_UNSAFE: according to mpich2 wiki FAQ, this issue was fixed since v1.5a1. PR: ports/207691 Submitted by: jiashiun (at) gmail.com Changes: head/net/mpich2/Makefile