multimedia/libvpx devel/glib2These have worked for me before (on NetBSD, that is). Interesting. Are you sure it's not a local issue?Likewise (on NetBSD-current/amd64 with MAKE_JOBS=32)
That's why I wouldn't want to just set MAKE_JOBS_SAFE=no, unless it was conditional for Ubuntu.
It's a fresh Ubuntu 16.04 install with apt update, upgrade, and install of gcc, g++ and cvs.
John