diff --git a/release/Makefile b/release/Makefile
index 6b4517dc4377..8a6ece7d1b58 100644
--- a/release/Makefile
+++ b/release/Makefile
@@ -23,6 +23,9 @@
 #  WITH_DVD: if set, generate dvd1.iso
 #  WITH_COMPRESSED_IMAGES: if set, compress installation images with xz(1)
 #		(uncompressed images are not removed)
+#  WITH_VMIMAGES: if set, build virtual machine images with the release
+#  WITH_COMPRESSED_VMIMAGES: if set, compress virtual machine disk images
+#  		with xz(1) (extremely time consuming)
 #  TARGET/TARGET_ARCH: architecture of built release
 #
 
@@ -94,6 +97,11 @@ IMAGES+=	memstick.img
 IMAGES+=	mini-memstick.img
 .endif
 
+VMTARGETS=	vm-base vm-image
+VMFORMATS?=	vhd vmdk qcow2 raw
+VMSIZE?=	20G
+VMBASE?=	vm
+
 CLEANFILES=	packagesystem *.txz MANIFEST system ${IMAGES}
 .if defined(WITH_COMPRESSED_IMAGES) && !empty(WITH_COMPRESSED_IMAGES)
 . for I in ${IMAGES}
@@ -103,7 +111,16 @@ CLEANFILES+=	${I}.xz
 .if defined(WITH_DVD) && !empty(WITH_DVD)
 CLEANFILES+=	pkg-stage
 .endif
+.if defined(WITH_VMIMAGES) && !empty(WITH_VMIMAGES)
+CLEANFILES+=	${VMBASE}.img
+. for FORMAT in ${VMFORMATS}
+CLEANFILES+=	${VMBASE}.${FORMAT}
+. endfor
+.endif
 CLEANDIRS=	dist ftp release bootonly dvd
+.if defined(WITH_VMIMAGES) && !empty(WITH_VMIMAGES)
+CLEANDIRS+=	${VMTARGETS}
+.endif
 beforeclean:
 	chflags -R noschg .
 .include <bsd.obj.mk>
@@ -263,6 +280,9 @@ ftp: packagesystem
 release:
 	${MAKE} -C ${.CURDIR} ${.MAKEFLAGS} obj
 	${MAKE} -C ${.CURDIR} ${.MAKEFLAGS} ${RELEASE_TARGETS}
+.if defined(WITH_VMIMAGES) && !empty(WITH_VMIMAGES)
+	${MAKE} -C ${.CURDIR} ${.MAKEFLAGS} ${VMTARGETS}
+.endif
 
 install:
 .if defined(DESTDIR) && !empty(DESTDIR)
@@ -277,3 +297,44 @@ install:
 .endfor
 	cd ${DESTDIR} && sha256 ${OSRELEASE}* > ${DESTDIR}/CHECKSUM.SHA256
 	cd ${DESTDIR} && md5 ${OSRELEASE}* > ${DESTDIR}/CHECKSUM.MD5
+.if defined(WITH_VMIMAGES) && !empty(WITH_VMIMAGES)
+	mkdir -p ${DESTDIR}/vmimages
+. for FORMAT in ${VMFORMATS}
+	cp -p ${VMBASE}.${FORMAT} \
+		${DESTDIR}/vmimages/${OSRELEASE}.${FORMAT}
+. endfor
+. if defined(WITH_COMPRESSED_VMIMAGES) && !empty(WITH_COMPRESSED_VMIMAGES)
+# This is very time consuming, so defer it after the images are moved to
+# the DESTDIR.
+.  for FORMAT in ${VMFORMATS}
+	# Don't keep the originals.  There is a copy in ${.OBJDIR} if needed.
+	${XZCMD} ${DESTDIR}/vmimages/${OSRELEASE}.${FORMAT}
+.  endfor
+. endif
+	cd ${DESTDIR}/vmimages && sha256 ${OSRELEASE}* > \
+		${DESTDIR}/vmimages/CHECKSUM.SHA256
+	cd ${DESTDIR}/vmimages && md5 ${OSRELEASE}* > \
+		${DESTDIR}/vmimages/CHECKSUM.MD5
+.endif
+
+vm-base:
+.if defined(WITH_VMIMAGES) && !empty(WITH_VMIMAGES)
+. if exists(${.CURDIR}/${TARGET}/mk-vmimage.sh)
+	env TARGET=${TARGET} TARGET_ARCH=${TARGET_ARCH} \
+		${.CURDIR}/${TARGET}/mk-vmimage.sh ${.TARGET} \
+		${VMBASE}.img ${WORLDDIR} ${.OBJDIR}/${.TARGET} ${VMSIZE}
+. endif
+.endif
+	touch ${.TARGET}
+
+vm-image: vm-base
+.if defined(WITH_VMIMAGES) && !empty(WITH_VMIMAGES)
+. if exists(${.CURDIR}/${TARGET}/mk-vmimage.sh)
+.  for FORMAT in ${VMFORMATS}
+	env TARGET=${TARGET} TARGET_ARCH=${TARGET_ARCH} \
+		${.CURDIR}/${TARGET}/mk-vmimage.sh ${.TARGET} \
+		${VMBASE}.img ${FORMAT} ${VMBASE}.${FORMAT}
+.  endfor
+. endif
+.endif
+	touch ${.TARGET}
diff --git a/release/amd64/mk-vmimage.sh b/release/amd64/mk-vmimage.sh
new file mode 100755
index 000000000000..6ee148248cd5
--- /dev/null
+++ b/release/amd64/mk-vmimage.sh
@@ -0,0 +1,188 @@
+#!/bin/sh
+#-
+# Copyright (c) 2014 The FreeBSD Foundation
+# All rights reserved.
+#
+# This software was developed by Glen Barber under sponsorship
+# from the FreeBSD Foundation.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# mk-vmimage.sh: Create virtual machine disk images in various formats.
+#
+# $FreeBSD$
+#
+
+PATH="/bin:/usr/bin:/sbin:/usr/sbin"
+export PATH
+
+usage_vm_base() {
+	echo -n "$(basename ${0}) vm-base <base image> <source tree>"
+	echo	" <dest dir> <disk image size>"
+	return 0
+}
+
+usage_vm_image() {
+	echo -n "$(basename ${0}) vm-image <base image> <image format>"
+	echo	" <output image>"
+	return 0
+}
+
+usage() {
+	echo "Usage:"
+	echo "$(basename ${0}) [vm-base|vm-image] [...]"
+	echo
+	usage_vm_base
+	echo
+	usage_vm_image
+	exit 1
+}
+
+panic() {
+	rc="${1}"
+	shift 1
+	msg="${@}"
+	printf "${msg}\n"
+	if [ ! -z "${mddev}" ]; then
+		mdconfig -d -u ${mddev}
+	fi
+	# Do not allow one failure case to chain through any remaining image
+	# builds.
+	exit 0
+}
+
+vm_create_baseimage() {
+	# Creates the UFS root filesystem for the virtual machine disk,
+	# written to the formatted disk image with mkimg(1).
+	#
+	# Arguments:
+	# vm-base <base image> <source tree> <dest dir> <disk image size>
+
+	VMBASE="${1}"
+	WORLDDIR="${2}"
+	DESTDIR="${3}"
+	VMSIZE="${4}"
+
+	if [ -z "${VMBASE}" -o -z "${WORLDDIR}" -o -z "${DESTDIR}" \
+		-o -z "${VMSIZE}" ]; then
+			usage
+	fi
+
+	i=0
+	mkdir -p ${DESTDIR}
+	truncate -s ${VMSIZE} ${VMBASE}
+	mddev=$(mdconfig -f ${VMBASE})
+	newfs -j /dev/${mddev}
+	mount /dev/${mddev} ${DESTDIR}
+	cd ${WORLDDIR} && \
+		make DESTDIR=${DESTDIR} \
+		installworld installkernel distribution || \
+		panic 1 "\n\nCannot install the base system to ${DESTDIR}."
+	chroot ${DESTDIR} /usr/bin/newaliases
+	echo '# Custom /etc/fstab for FreeBSD VM images' \
+		> ${DESTDIR}/etc/fstab
+	echo '/dev/gpt/rootfs	/	ufs	rw	2	2' \
+		>> ${DESTDIR}/etc/fstab
+	echo '/dev/gpt/swapfs	none	swap	sw	0	0' \
+		>> ${DESTDIR}/etc/fstab
+	sync
+	while ! umount ${DESTDIR}; do
+		i=$(( $i + 1 ))
+		if [ $i -ge 10 ]; then
+			# This should never happen.  But, it has happened.
+			msg="Cannot umount(8) ${DESTDIR}\n"
+			msg="${msg}Something has gone horribly wrong."
+			panic 1 "${msg}"
+		fi
+		sleep 1
+	done
+
+	return 0
+}
+
+vm_create_vmdisk() {
+	# Creates the virtual machine disk image from the raw disk image.
+	#
+	# Arguments:
+	# vm-image <base image> <image format> <output image>"
+
+	VMBASE="${1}"
+	FORMAT="${2}"
+	VMIMAGE="${3}"
+
+	if [ -z "${VMBASE}" -o -z "${FORMAT}" -o -z "${VMIMAGE}" ]; then
+		usage
+	fi
+
+	mkimg_version=$(mkimg --version 2>/dev/null | awk '{print $2}')
+
+	# We need mkimg(1) '--version' output, at minimum, to be able to
+	# tell what virtual machine disk image formats are available.
+	# Bail if mkimg(1) reports an empty '--version' value.
+	if [ -z "${mkimg_version}" ]; then
+		msg="Cannot determine mkimg(1) version.\n"
+		msg="${msg}Cannot continue without a known mkimg(1) version."
+		panic 0 "${msg}"
+	fi
+
+	if ! mkimg --formats 2>/dev/null | grep -q ${FORMAT}; then
+		panic 0 "'${FORMAT}' is not supported by this mkimg(1).\n"
+	fi
+
+	case ${FORMAT} in
+		vhd)
+			mkimg_format=vhdf
+			;;
+		*)
+			mkimg_format=${FORMAT}
+			;;
+	esac
+
+	mkimg -f ${mkimg_format} -s gpt \
+		-b /boot/pmbr -p freebsd-boot/bootfs:=/boot/gptboot \
+		-p freebsd-swap/swapfs::1G \
+		-p freebsd-ufs/rootfs:=${VMBASE} \
+		-o ${VMIMAGE}
+
+	return 0
+}
+
+main() {
+	cmd="${1}"
+	shift 1
+
+	case ${cmd} in
+		vm-base)
+			eval vm_create_baseimage "$@" || return 0
+			;;
+		vm-image)
+			eval vm_create_vmdisk "$@" || return 0
+			;;
+		*|\?)
+			usage
+			;;
+	esac
+
+	return 0
+}
+
+main "$@"
diff --git a/release/i386/mk-vmimage.sh b/release/i386/mk-vmimage.sh
new file mode 100755
index 000000000000..6ee148248cd5
--- /dev/null
+++ b/release/i386/mk-vmimage.sh
@@ -0,0 +1,188 @@
+#!/bin/sh
+#-
+# Copyright (c) 2014 The FreeBSD Foundation
+# All rights reserved.
+#
+# This software was developed by Glen Barber under sponsorship
+# from the FreeBSD Foundation.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# mk-vmimage.sh: Create virtual machine disk images in various formats.
+#
+# $FreeBSD$
+#
+
+PATH="/bin:/usr/bin:/sbin:/usr/sbin"
+export PATH
+
+usage_vm_base() {
+	echo -n "$(basename ${0}) vm-base <base image> <source tree>"
+	echo	" <dest dir> <disk image size>"
+	return 0
+}
+
+usage_vm_image() {
+	echo -n "$(basename ${0}) vm-image <base image> <image format>"
+	echo	" <output image>"
+	return 0
+}
+
+usage() {
+	echo "Usage:"
+	echo "$(basename ${0}) [vm-base|vm-image] [...]"
+	echo
+	usage_vm_base
+	echo
+	usage_vm_image
+	exit 1
+}
+
+panic() {
+	rc="${1}"
+	shift 1
+	msg="${@}"
+	printf "${msg}\n"
+	if [ ! -z "${mddev}" ]; then
+		mdconfig -d -u ${mddev}
+	fi
+	# Do not allow one failure case to chain through any remaining image
+	# builds.
+	exit 0
+}
+
+vm_create_baseimage() {
+	# Creates the UFS root filesystem for the virtual machine disk,
+	# written to the formatted disk image with mkimg(1).
+	#
+	# Arguments:
+	# vm-base <base image> <source tree> <dest dir> <disk image size>
+
+	VMBASE="${1}"
+	WORLDDIR="${2}"
+	DESTDIR="${3}"
+	VMSIZE="${4}"
+
+	if [ -z "${VMBASE}" -o -z "${WORLDDIR}" -o -z "${DESTDIR}" \
+		-o -z "${VMSIZE}" ]; then
+			usage
+	fi
+
+	i=0
+	mkdir -p ${DESTDIR}
+	truncate -s ${VMSIZE} ${VMBASE}
+	mddev=$(mdconfig -f ${VMBASE})
+	newfs -j /dev/${mddev}
+	mount /dev/${mddev} ${DESTDIR}
+	cd ${WORLDDIR} && \
+		make DESTDIR=${DESTDIR} \
+		installworld installkernel distribution || \
+		panic 1 "\n\nCannot install the base system to ${DESTDIR}."
+	chroot ${DESTDIR} /usr/bin/newaliases
+	echo '# Custom /etc/fstab for FreeBSD VM images' \
+		> ${DESTDIR}/etc/fstab
+	echo '/dev/gpt/rootfs	/	ufs	rw	2	2' \
+		>> ${DESTDIR}/etc/fstab
+	echo '/dev/gpt/swapfs	none	swap	sw	0	0' \
+		>> ${DESTDIR}/etc/fstab
+	sync
+	while ! umount ${DESTDIR}; do
+		i=$(( $i + 1 ))
+		if [ $i -ge 10 ]; then
+			# This should never happen.  But, it has happened.
+			msg="Cannot umount(8) ${DESTDIR}\n"
+			msg="${msg}Something has gone horribly wrong."
+			panic 1 "${msg}"
+		fi
+		sleep 1
+	done
+
+	return 0
+}
+
+vm_create_vmdisk() {
+	# Creates the virtual machine disk image from the raw disk image.
+	#
+	# Arguments:
+	# vm-image <base image> <image format> <output image>"
+
+	VMBASE="${1}"
+	FORMAT="${2}"
+	VMIMAGE="${3}"
+
+	if [ -z "${VMBASE}" -o -z "${FORMAT}" -o -z "${VMIMAGE}" ]; then
+		usage
+	fi
+
+	mkimg_version=$(mkimg --version 2>/dev/null | awk '{print $2}')
+
+	# We need mkimg(1) '--version' output, at minimum, to be able to
+	# tell what virtual machine disk image formats are available.
+	# Bail if mkimg(1) reports an empty '--version' value.
+	if [ -z "${mkimg_version}" ]; then
+		msg="Cannot determine mkimg(1) version.\n"
+		msg="${msg}Cannot continue without a known mkimg(1) version."
+		panic 0 "${msg}"
+	fi
+
+	if ! mkimg --formats 2>/dev/null | grep -q ${FORMAT}; then
+		panic 0 "'${FORMAT}' is not supported by this mkimg(1).\n"
+	fi
+
+	case ${FORMAT} in
+		vhd)
+			mkimg_format=vhdf
+			;;
+		*)
+			mkimg_format=${FORMAT}
+			;;
+	esac
+
+	mkimg -f ${mkimg_format} -s gpt \
+		-b /boot/pmbr -p freebsd-boot/bootfs:=/boot/gptboot \
+		-p freebsd-swap/swapfs::1G \
+		-p freebsd-ufs/rootfs:=${VMBASE} \
+		-o ${VMIMAGE}
+
+	return 0
+}
+
+main() {
+	cmd="${1}"
+	shift 1
+
+	case ${cmd} in
+		vm-base)
+			eval vm_create_baseimage "$@" || return 0
+			;;
+		vm-image)
+			eval vm_create_vmdisk "$@" || return 0
+			;;
+		*|\?)
+			usage
+			;;
+	esac
+
+	return 0
+}
+
+main "$@"
diff --git a/release/release.conf.sample b/release/release.conf.sample
index bdd5a8a05d91..c79ed9f87003 100644
--- a/release/release.conf.sample
+++ b/release/release.conf.sample
@@ -77,3 +77,24 @@ PORTBRANCH="ports/head@rHEAD"
 ## as TARGET/TARGET_ARCH.
 #CHROOT_MAKEENV=
 
+## Set to a non-empty value to build virtual machine images as part of the
+## release build.
+#WITH_VMIMAGES=
+
+## Set to a non-empty value to compress virtual machine images with xz(1)
+## as part of the release build.
+#WITH_COMPRESSED_VMIMAGES=
+
+## If WITH_VMIMAGES is set to a non-empty value, this is the name of the
+## file to use for the installed userland/kernel.
+#VMBASE="vm"
+
+## If WITH_VMIMAGES is set to a non-empty value, this is the size of the
+## virtual machine disk filesystem.  Valid size values are described in
+## the truncate(1) manual page.
+#VMSIZE="20G"
+
+## If WITH_VMIMAGES is set to a non-empty value, this is a list of disk
+## image formats to create.  Valid values are listed in the mkimg(1)
+## manual page, as well as 'mkimg --formats' output.
+#VMFORMATS="vhdf vmdk qcow2 raw"
diff --git a/release/release.sh b/release/release.sh
index e99c403d22b0..87b36974070a 100755
--- a/release/release.sh
+++ b/release/release.sh
@@ -89,6 +89,11 @@ NOPORTS=
 WITH_DVD=
 WITH_COMPRESSED_IMAGES=
 
+# Set to non-empty value to build virtual machine images as part of
+# the release.
+WITH_VMIMAGES=
+WITH_COMPRESSED_VMIMAGES=
+
 usage() {
 	echo "Usage: $0 [-c release.conf]"
 	exit 1
@@ -169,7 +174,7 @@ CHROOT_DMAKEFLAGS="${CONF_FILES}"
 RELEASE_WMAKEFLAGS="${MAKE_FLAGS} ${WORLD_FLAGS} ${ARCH_FLAGS} ${CONF_FILES}"
 RELEASE_KMAKEFLAGS="${MAKE_FLAGS} ${KERNEL_FLAGS} KERNCONF=\"${KERNEL}\" ${ARCH_FLAGS} ${CONF_FILES}"
 RELEASE_RMAKEFLAGS="${ARCH_FLAGS} KERNCONF=\"${KERNEL}\" ${CONF_FILES} \
-	${DOCPORTS} WITH_DVD=${WITH_DVD}"
+	${DOCPORTS} WITH_DVD=${WITH_DVD} WITH_VMIMAGES=${WITH_VMIMAGES}"
 
 # Force src checkout if configured
 FORCE_SRC_KEY=
@@ -274,4 +279,5 @@ eval chroot ${CHROOTDIR} make -C /usr/src ${RELEASE_KMAKEFLAGS} buildkernel
 eval chroot ${CHROOTDIR} make -C /usr/src/release ${RELEASE_RMAKEFLAGS} \
 	release
 eval chroot ${CHROOTDIR} make -C /usr/src/release ${RELEASE_RMAKEFLAGS} \
-	install DESTDIR=/R WITH_COMPRESSED_IMAGES=${WITH_COMPRESSED_IMAGES}
+	install DESTDIR=/R WITH_COMPRESSED_IMAGES=${WITH_COMPRESSED_IMAGES} \
+	WITH_COMPRESSED_VMIMAGES=${WITH_COMPRESSED_VMIMAGES}
diff --git a/share/man/man7/release.7 b/share/man/man7/release.7
index 8fc75f3da4eb..93aec89618a9 100644
--- a/share/man/man7/release.7
+++ b/share/man/man7/release.7
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 11, 2014
+.Dd October 2, 2014
 .Dt RELEASE 7
 .Os
 .Sh NAME
@@ -351,6 +351,61 @@ Set to the target directory within
 to check out
 .Va ${UBOOTSRC}/${UBOOTBRANCH} .
 .El
+.Sh VIRTUAL MACHINE DISK IMAGES
+The following
+.Fa release.conf
+variables are relevant only to virtual machine disk image builds:
+.Bl -tag -width Ev
+.It Va WITH_VMIMAGES
+Set to a non-null value to build virtual machine disk images as part
+of the release build.
+.Va WITH_VMIMAGES
+may also be specified as an envirionment variable passed to
+.Xr make 1 .
+.Pp
+The option requires
+.Xr mkimg 1
+version 20140927 or later.
+.It Va WITH_COMPRESSED_VMIMAGES
+Set to a non-null value to compress the virtual machine disk images with
+.Xr xz 1
+as part of the
+.Cm install
+.Xr make 1
+target.
+Note that compressing virtual machine disk images may take a very long
+time on some systems.
+.It Va VMBASE
+Set to change the name of the resulting virtual machine disk image file.
+The default value is
+.Va vm .
+.It Va VMSIZE
+Set to change the size of the virtual machine disk capacity.
+The default value is
+.Va 20G .
+See
+.Xr truncate 1
+for valid values.
+.Pp
+Virtual machine disk images are, by default, created as sparse images.
+When
+.Va WITH_COMPRESSED_VMIMAGES
+is used, the resulting files compressed with
+.Xr xz 1
+compress to roughly the same size, regardless of the specified disk image
+size.
+.It Va VMFORMATS
+Set to the target virtual disk image format(s) to create.
+By default, the
+.Va vhdf , Va vmdk , Va qcow2 ,
+and
+.Va raw
+formats are created.
+See
+.Xr mkimg 1
+for valid format values
+.Pq requires version 20140927 or later .
+.El
 .Sh MAKEFILE TARGETS
 The release makefile
 .Pq Pa src/release/Makefile
@@ -407,6 +462,14 @@ Creates a directory named
 .Pa ftp
 containing the distribution files used in network installations
 and suitable for upload to an FTP mirror.
+.It Cm vm-image
+Creates virtual machine disk images in various formats.
+The
+.Cm vm-image
+target requires the
+.Va WITH_VMIMAGES
+.Xr make 1
+envirionment variable to be set to a non-null value.
 .El
 .Pp
 Major subtargets called by targets above: