Is it really possible to build NetBSD with read only /usr/src? Whatever build.sh options or mk.conf variables I tried to use, build.sh always tries to write to /usr/src Always set variables: MKUNPRIVED= yes TOOLDIR= /usr/obj/tools DESTDIR= /usr/obj/destdir RELEASEDIR= /usr/obj/release X11SRCDIR= /usr/xsrc -- Best regards, Aleksey Cheusov.