Without MAKE_JOBS, dbus-glib compiles without errors on my machine (DragonFly
BSD) while using for example MAKE_JOBS=2 (also tried with MAKE_JOBS=5) in my
mk.conf makes the package unbuildable "gmake[4]: *** No rule to make target
`../dbus/libdbus-glib-1.la', needed by `dbus-glib-test'.  Stop.".

Anyone else can confirm this (maybe even on other systems)?