diff --git a/debian/control b/debian/control
index 1f2c207..c97d392 100644
--- a/debian/control
+++ b/debian/control
@@ -42,7 +42,7 @@ Depends:
  u-boot-tools,
  xz-utils
 Suggests:
- virtualbox
+ debootstrap
 Description: FreedomBox image builder
  FreedomBox is a personal cloud server which can be installed on single board
  computers and Debian machines.
diff --git a/freedommaker/builders/__init__.py b/freedommaker/builders/__init__.py
index dd694f3..139c654 100644
--- a/freedommaker/builders/__init__.py
+++ b/freedommaker/builders/__init__.py
@@ -25,10 +25,3 @@ from . import pine64_plus
 from . import pine64_lts
 from . import qemu_amd64
 from . import qemu_i386
-from . import raspberry_pi_2
-from . import raspberry_pi_3
-from . import raspberry_pi_3_b_plus
-from . import raspberry_pi_with_uboot
-from . import vagrant
-from . import virtualbox_amd64
-from . import virtualbox_i386
diff --git a/freedommaker/builders/raspberry_pi_2.py b/freedommaker/builders/raspberry_pi_2.py
deleted file mode 100644
index c226683..0000000
--- a/freedommaker/builders/raspberry_pi_2.py
+++ /dev/null
@@ -1,15 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-"""
-Worker class to build Raspberry Pi 2 image.
-"""
-
-from .raspberry_pi_with_uboot import RaspberryPiWithUBoot
-
-
-class RaspberryPi2ImageBuilder(RaspberryPiWithUBoot):
-    """Image builder for Raspberry Pi 2 target."""
-    architecture = 'armhf'
-    machine = 'raspberry2'
-    kernel_flavor = 'armmp'
-    flash_kernel_name = 'Raspberry Pi 2 Model B'
-    uboot_variant = 'rpi_2'
diff --git a/freedommaker/builders/raspberry_pi_3.py b/freedommaker/builders/raspberry_pi_3.py
deleted file mode 100644
index 797e8df..0000000
--- a/freedommaker/builders/raspberry_pi_3.py
+++ /dev/null
@@ -1,16 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-"""
-Worker class to build Raspberry Pi 3 image.
-"""
-
-from .raspberry_pi_with_uboot import RaspberryPiWithUBoot
-
-
-class RaspberryPi3ImageBuilder(RaspberryPiWithUBoot):
-    """Image builder for Raspberry Pi 3 target."""
-    architecture = 'armhf'
-    machine = 'raspberry3'
-    free = False
-    kernel_flavor = 'armmp'
-    flash_kernel_name = 'Raspberry Pi 3 Model B'
-    uboot_variant = 'rpi_3_32b'
diff --git a/freedommaker/builders/raspberry_pi_3_b_plus.py b/freedommaker/builders/raspberry_pi_3_b_plus.py
deleted file mode 100644
index 7a54842..0000000
--- a/freedommaker/builders/raspberry_pi_3_b_plus.py
+++ /dev/null
@@ -1,12 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-"""
-Worker class to build Raspberry Pi 3 Model B+ image.
-"""
-
-from .raspberry_pi_3 import RaspberryPi3ImageBuilder
-
-
-class RaspberryPi3BPlusImageBuilder(RaspberryPi3ImageBuilder):
-    """Image builder for Raspberry Pi 3 Model B+ target."""
-    machine = 'raspberry3-b-plus'
-    flash_kernel_name = 'Raspberry Pi 3 Model B+'
diff --git a/freedommaker/builders/raspberry_pi_with_uboot.py b/freedommaker/builders/raspberry_pi_with_uboot.py
deleted file mode 100644
index 8057f87..0000000
--- a/freedommaker/builders/raspberry_pi_with_uboot.py
+++ /dev/null
@@ -1,44 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-"""
-Base worker class to build Raspberry Pi 2 and 3 images.
-"""
-
-from .. import library
-from .arm import ARMImageBuilder
-
-
-class RaspberryPiWithUBoot(ARMImageBuilder):
-    """Base image builder for Raspberry Pi 2 and 3 targets."""
-    free = False
-    uboot_variant = None
-    firmware_filesystem_type = 'vfat'
-    firmware_size = '64MiB'
-
-    def install_boot_loader(self, state):
-        """Install the boot loader onto the image."""
-        if not self.uboot_variant:
-            raise NotImplementedError
-
-        firmware_package = 'raspi-firmware'
-        script = '''
-set -e
-set -x
-set -o pipefail
-
-apt-get install --no-install-recommends -y dpkg-dev
-cd /tmp
-apt-get source {firmware_package}
-cp {firmware_package}*/boot/* /boot/firmware
-rm -rf {firmware_package}*
-cd /
-
-# remove unneeded firmware files
-rm -f /boot/firmware/fixup_*
-rm -f /boot/firmware/start_*
-
-# u-boot setup
-apt-get install -y u-boot-rpi
-cp /usr/lib/u-boot/{uboot_variant}/u-boot.bin /boot/firmware/kernel.img
-cp /usr/lib/u-boot/{uboot_variant}/u-boot.bin /boot/firmware/kernel7.img
-'''.format(firmware_package=firmware_package, uboot_variant=self.uboot_variant)
-        library.run_in_chroot(state, ['bash', '-c', script])
diff --git a/freedommaker/builders/vagrant.py b/freedommaker/builders/vagrant.py
deleted file mode 100644
index 13d124d..0000000
--- a/freedommaker/builders/vagrant.py
+++ /dev/null
@@ -1,41 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-"""
-Worker class to build Vagrant images.
-"""
-
-import os
-
-from .. import library
-from .virtualbox_amd64 import VirtualBoxAmd64ImageBuilder
-
-
-class VagrantImageBuilder(VirtualBoxAmd64ImageBuilder):
-    """Image builder for Vagrant package."""
-    vagrant_extension = '.box'
-
-    @classmethod
-    def get_target_name(cls):
-        """Return the name of the target for an image builder."""
-        return 'vagrant'
-
-    def build(self):
-        """Run the image building process."""
-        vm_file = self._replace_extension(self.image_file,
-                                          self.vm_image_extension)
-        vagrant_file = self._replace_extension(self.image_file,
-                                               self.vagrant_extension)
-
-        self.make_image()
-        self.create_vm_file(self.image_file, vm_file)
-        os.remove(self.image_file)
-        self.vagrant_package(vm_file, vagrant_file)
-
-    def vagrant_package(self, vm_file, vagrant_file):
-        """Create a vagrant package from VM file."""
-        command = [
-            'bin/vagrant-package', '--distribution',
-            self.arguments.distribution, '--release-components'
-        ]
-        command.extend(self.release_components)
-        command += ['--output', vagrant_file, vm_file]
-        library.run(command)
diff --git a/freedommaker/builders/virtualbox.py b/freedommaker/builders/virtualbox.py
deleted file mode 100644
index 73c1965..0000000
--- a/freedommaker/builders/virtualbox.py
+++ /dev/null
@@ -1,31 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-"""
-Base worker class to build VirtualBox images.
-"""
-
-import os
-
-from .. import library
-from .vm import VMImageBuilder
-
-
-class VirtualBoxImageBuilder(VMImageBuilder):
-    """Base image builder for all VirtualBox targets."""
-    vm_image_extension = '.vdi'
-
-    @classmethod
-    def get_target_name(cls):
-        """Return the name of the target for an image builder."""
-        if getattr(cls, 'architecture', None):
-            return 'virtualbox-' + cls.architecture
-
-        return None
-
-    def create_vm_file(self, image_file, vm_file):
-        """Create a VM file from image file."""
-        try:
-            os.remove(vm_file)
-        except FileNotFoundError:
-            pass
-
-        library.run(['VBoxManage', 'convertdd', image_file, vm_file])
diff --git a/freedommaker/builders/virtualbox_amd64.py b/freedommaker/builders/virtualbox_amd64.py
deleted file mode 100644
index 20108d6..0000000
--- a/freedommaker/builders/virtualbox_amd64.py
+++ /dev/null
@@ -1,12 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-"""
-Worker class to build VirtualBox amd64 images.
-"""
-
-from .virtualbox import VirtualBoxImageBuilder
-
-
-class VirtualBoxAmd64ImageBuilder(VirtualBoxImageBuilder):
-    """Image builder for all VirtualBox amd64 targets."""
-    architecture = 'amd64'
-    kernel_flavor = 'amd64'
diff --git a/freedommaker/builders/virtualbox_i386.py b/freedommaker/builders/virtualbox_i386.py
deleted file mode 100644
index 9380a6a..0000000
--- a/freedommaker/builders/virtualbox_i386.py
+++ /dev/null
@@ -1,12 +0,0 @@
-# SPDX-License-Identifier: GPL-3.0-or-later
-"""
-Worker class to build VirtualBox i386 images.
-"""
-
-from .virtualbox import VirtualBoxImageBuilder
-
-
-class VirtualBoxI386ImageBuilder(VirtualBoxImageBuilder):
-    """Image builder for all VirtualBox i386 targets."""
-    architecture = 'i386'
-    kernel_flavor = '686'