Building NetBSD 7.0RC3 on KVM

Today I tested out building NetBSD 7 on a NetBSD 6 KVM virtual machine.

Here's the command line for starting the vm:
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qemu-system-x86_64 -smp 4 -cpu host -enable-kvm -m 2048 -vga std -vnc :0 -drive file=$PWD/nbsd/wd01.img,index=0,media=disk,format=raw -net nic,model=e1000 -net user -redir tcp:5550::22 &
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here's the post-build summary from build.sh:
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         build.sh command:    ./build.sh -O /usr/obj -U -j 4 tools kernel=RND0 modules distribution sets
         build.sh started:    Mon Sep 14 16:58:05 AKDT 2015
         NetBSD version:      7.0_RC3
         MACHINE:             amd64
         MACHINE_ARCH:        x86_64
         Build platform:      NetBSD 6.1.5 amd64
         HOST_SH:             /bin/sh
         MAKECONF file:       /etc/mk.conf (File not found)
         TOOLDIR path:        /usr/obj/tooldir.NetBSD-6.1.5-amd64
         DESTDIR path:        /usr/obj/destdir.amd64
         RELEASEDIR path:     /usr/obj/releasedir
         Updated makewrapper: /usr/obj/tooldir.NetBSD-6.1.5-amd64/bin/nbmake-amd64
         Tools built to /usr/obj/tooldir.NetBSD-6.1.5-amd64
         Building kernel:     RND0
         Build directory:     /usr/obj/sys/arch/amd64/compile/RND0
         Kernels built from RND0:
          /usr/obj/sys/arch/amd64/compile/RND0/netbsd
         Building kernel modules for NetBSD/amd64 7.0_RC3
         Successful build of kernel modules for NetBSD/amd64 7.0_RC3
         Successful make distribution
         Building sets from pre-populated /usr/obj/destdir.amd64
         Built sets to /usr/obj/releasedir/amd64/binary/sets
         build.sh ended:      Mon Sep 14 18:08:47 AKDT 2015
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Testing and installing it now -90 minutes isn't too shabby for a VM build. The host machine barely felt it, btw; no real noticeable performance hit.
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I blitzed the install by following the instructions on the guide, but that doesn't matter that much -I found out what I wanted to know.