make release: creating a trimmed down release?

I'd like to create a trimmed down release, but it looks like
make release -DNO_CXX ... is not the way to go. What's the official
way of doing this kind of stuff? Specifically, I've attempted the build
with

  make release \
    BUILDNAME=$buildname \
    CHROOTDIR=$chrootdir \
    CVSROOT=$cvsroot \
    EXTSRCDIR=$extsrcdir \
    RELEASETAG=$releasetag \
    KERNEL_FLAGS=-j8 \
    WORLD_FLAGS=-j8 \
    -DNODOC \
    -DNOPORTS \
    -DNO_CXX \
    -DNO_BLUETOOTH \
    -DNO_DYNAMICROOT \
    -DNO_FORTRAN \
    -DNO_I4B \
    -DNO_IPFILTER \
    -DNO_KERBEROS \
    -DNO_OBJC \
    -DNO_OPENSSH \
    -DNO_OPENSSL \
    -DNO_SENDMAIL \
    -DNO_TOOLCHAIN \
    -DNOATM \
    -DNOGAMES \
    -DNOINET6 \
    -DNOPROFILE \
    -DNO_BIND


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