"make build" should now work as a non-root user (tested on Alpha).
mtree spits out lots of warnings during "make distrib-dirs", but
these are non-fatal.
and libs in the object tree, if you use a separate object tree,
while maintaining backward compatability with other build methods.
See the notes in src/share/mk/bsd.README for full details. Note
that the `make includes' target now only installs the include files
in the build directory (if you use one--otherwise they go in DESTDIR
just like before); `make install' will install include files in
DESTDIR.