diff --git a/kernel-overlay/pkg/image/postinst b/kernel-overlay/pkg/image/postinst
deleted file mode 100755
index 4ec364c..0000000
--- a/kernel-overlay/pkg/image/postinst
+++ /dev/null
@@ -1,443 +0,0 @@
-#! /usr/bin/perl
-#                              -*- Mode: Cperl -*-
-# debian.postinst ---
-# Author           : Manoj Srivastava ( srivasta@pilgrim.umass.edu )
-# Created On       : Sat Apr 27 05:55:26 1996
-# Created On Node  : melkor.pilgrim.umass.edu
-# Last Modified By : Manoj Srivastava
-# Last Modified On : Mon Apr 13 14:24:43 2009
-# Last Machine Used: anzu.internal.golden-gryphon.com
-# Update Count     : 362
-# Status           : Unknown, Use with caution!
-# HISTORY          :
-# Description      :
-#
-#    $Id: image.postinst,v 1.125 2003/10/07 16:24:20 srivasta Exp $
-#
-
-#
-#use strict; #for debugging
-use Cwd 'abs_path';
-use Debconf::Client::ConfModule qw(:all);
-version('2.0');
-my $capb = capb("backup");
-
-$| = 1;
-
-# Predefined values:
-my $version           = "=V";
-my $move_image        = '';     # target machine defined
-my $kimage            = "=K";   # Should be empty, mostly
-my $image_dir         = "=D";   # where the image is located
-my $clobber_modules   = '';     # target machine defined
-my $initrd            = "=I";   # initrd kernel
-my $postinst_hook     = '';     #Normally we do not
-my $postrm_hook       = '';     #Normally we do not
-my $preinst_hook      = '';     #Normally we do not
-my $prerm_hook        = '';     #Normally we do not
-my $ignore_depmod_err = '';     # normally we do not
-my $relink_src_link   = 'YES';  # There is no harm in checking the link
-my $relink_build_link = 'YES';  # There is no harm in checking the link
-my $force_build_link  = '';     # There is no harm in checking the link
-my $arch              = "=A";   #  should be same as dpkg --print-architecture
-my $kernel_arch       = "=B";
-my $package_name       = "=ST-image-$version";
-my $kernel_pkg_version = "=KPV";
-
-#known variables
-my $image_dest     = "/";
-my $realimageloc   = "/$image_dir/";
-my $have_conffile  = "";
-my $silent_modules = '';
-my $warn_reboot    = 'Yes';         # Warn that we are installing a version of
-                                    # the kernel we are running
-
-my $modules_base = '/lib/modules';
-my $CONF_LOC     = '/etc/kernel-img.conf';
-
-# Ignore all invocations except when called on to configure.
-exit 0 unless $ARGV[0] =~ /configure/;
-
-my $DEBUG = 0;
-
-# Do some preliminary sanity checks here to ensure we actually have an
-# valid image dir
-chdir('/') or die "could not chdir to /:$!\n";
-die "Internal Error: ($image_dir) is not a directory!\n"
-  unless -d $image_dir;
-
-# remove multiple leading slashes; make sure there is at least one.
-$realimageloc =~ s|^/*|/|o;
-$realimageloc =~ s|/+|/|o;
-die "Internal Error: ($realimageloc) is not a directory!\n"
-  unless -d $realimageloc;
-
-if ( -r "$CONF_LOC" && -f "$CONF_LOC" ) {
-  if ( open( CONF, "$CONF_LOC" ) ) {
-    while (<CONF>) {
-      chomp;
-      s/\#.*$//g;
-      next if /^\s*$/;
-
-      $move_image      = "" if m/^\s*move_image\s*=\s*(no|false|0)\s*$/i;
-      $clobber_modules = '' if m/^\s*clobber_modules\s*=\s*(no|false|0)\s*$/i;
-      $silent_modules  = '' if m/^\s*silent_modules\s*=\s*(no|false|0)\s*$/i;
-      $warn_reboot     = '' if m/^\s*warn_reboot\s*=\s*(no|false|0)\s*$/i;
-      $ignore_depmod_err = ''
-        if m/^\s*ignore_depmod_err\s*=\s*(no|false|0)\s*$/i;
-      $relink_src_link = '' if m/^\s*relink_src_link\s*=\s*(no|false|0)\s*$/i;
-      $relink_build_link = ''
-        if m/^\s*relink_build_link\s*=\s*(no|false|0)\s*$/i;
-      $force_build_link = ''
-        if m/^\s*force_build_link\s*=\s*(no|false|0)\s*$/i;
-
-      $move_image = "Yes" if m/^\s*move_image\s*=\s*(yes|true|1)\s*$/i;
-      $clobber_modules = "Yes"
-        if m/^\s*clobber_modules\s*=\s*(yes|true|1)\s*$/i;
-      $silent_modules = 'Yes'
-        if m/^\s*silent_modules\s*=\s*(yes|true|1)\s*$/i;
-      $warn_reboot = 'Yes' if m/^\s*warn_reboot\s*=\s*(yes|true|1)\s*$/i;
-      $ignore_depmod_err = 'Yes'
-        if m/^\s*ignore_depmod_err\s*=\s*(yes|true|1)\s*$/i;
-      $relink_src_link = 'Yes'
-        if m/^\s*relink_src_link\s*=\s*(yes|true|1)\s*$/i;
-      $relink_build_link = 'Yes'
-        if m/^\s*relink_build_link\s*=\s*(yes|true|1)\s*$/i;
-      $force_build_link = 'Yes'
-        if m/^\s*force_build_link\s*=\s*(yes|true|1)\s*$/i;
-
-      $image_dest    = "$1" if m/^\s*image_dest\s*=\s*(\S+)/i;
-      $postinst_hook = "$1" if m/^\s*postinst_hook\s*=\s*(\S+)/i;
-      $postrm_hook   = "$1" if m/^\s*postrm_hook\s*=\s*(\S+)/i;
-      $preinst_hook  = "$1" if m/^\s*preinst_hook\s*=\s*(\S+)/i;
-      $prerm_hook    = "$1" if m/^\s*prerm_hook\s*=\s*(\S+)/i;
-      $mkimage       = "$1" if m/^\s*mkimage\s*=\s*(.+)$/i;
-      $ramdisk       = "$1" if m/^\s*ramdisk\s*=\s*(.+)$/i;
-    } ## end while (<CONF>)
-    close CONF;
-    $have_conffile = "Yes";
-  } ## end if ( open( CONF, "$CONF_LOC"...))
-} ## end if ( -r "$CONF_LOC" &&...)
-else {
-  if ( open( CONF, ">$CONF_LOC" ) ) {
-    print CONF "# Kernel Image management overrides\n";
-    print CONF "# See kernel-img.conf(5) for details\n";
-    if ( $loader =~ /palo/i ) {
-      print CONF "link_in_boot = Yes\n";
-      print CONF "do_symlinks = Yes\n";
-      print CONF "relative_links = Yes\n";
-    }
-    else {
-      print CONF "do_symlinks = No\n";
-      print CONF "do_bootloader = No\n";
-      print CONF "do_initrd = Yes\n";
-      print CONF "link_in_boot = No\n";
-
-    } ## end else [ if ( $loader =~ /palo/i)]
-    close CONF;
-    $have_conffile = "Yes";
-  } ## end if ( open( CONF, ">$CONF_LOC"...))
-} ## end else [ if ( -r "$CONF_LOC" &&...)]
-
-# For some versions of kernel-package, we had this warning in the
-# postinst, but the rules did not really interpolate the value in.
-# Here is a sanity check.
-my $pattern = "=" . "I";
-$initrd =~ s/^$pattern$//;
-
-# Tack on at least one trainling /
-$image_dest = "$image_dest/";
-$image_dest =~ s|^/*|/|o;
-$image_dest =~ s|/+$|/|o;
-
-if ( !-d "$image_dest" ) {
-  die
-    "Expected Image Destination dir ($image_dest) to be a valid directory!\n";
-}
-
-# most of our work is done in $image_dest (nominally /)
-chdir("$image_dest") or die "could not chdir to $image_dest:$!\n";
-
-# Paranoid check to make sure that the correct value is put in there
-if ( !$kimage ) { $kimage = "vmlinuz"; }    # Hmm. empty
-elsif ( $kimage =~ m/^b?zImage$/o ) {
-  $kimage = "vmlinuz";
-}                                           # these produce vmlinuz
-elsif ( $kimage =~ m/^[iI]mage$/o ) { my $nop = $kimage; }
-elsif ( $kimage =~ m/^vmlinux$/o )  { my $nop = $kimage; }
-elsif ( $kimage =~ m/^xen[0u]-linux$/o ) {
-  $package_name = "${kimage}-$version";
-}
-elsif ( $kimage =~ m/^uImage$/o ) { my $nop = $kimage; }
-else                              { $kimage = "vmlinuz" }    # default
-### EDIT(aiy): Return Image for $kimage
-$kimage = "Image";
-
-$ENV{KERNEL_ARCH} = $kernel_arch if $kernel_arch;
-
-### EDIT(aiy): Return $kimage instead of $kimage-$version
-die "Internal Error: Could not find image ("
-  . $realimageloc
-  . "$kimage-$version)\n"
-  unless -e $realimageloc
-  . "$kimage";
-  # . "$kimage-$version";
-
-######################################################################
-## Fix the build link
-######################################################################
-sub fix_build_link {
-  return unless -d "$modules_base/$version";
-
-  # if we saved a build link in preinst, restore the link
-  if (!-e "$modules_base/$version/build"
-    && -l "$modules_base/$version/build.save" ) {
-    rename( "$modules_base/$version/build.save",
-      "$modules_base/$version/build" )
-      || die "failed to move $modules_base/$version/build:$!";
-  } ## end if ( !-e "$modules_base/$version/build"...)
-  if ( $relink_build_link || $force_build_link ) {
-    my $build_target;
-    my $real_target = '';
-    if ( -l "$modules_base/$version/build" ) {
-      $build_target = readlink "$modules_base/$version/build";
-    }
-    else {
-      return;
-    }
-
-    # Determine what the real file name is, and test that for existence
-    $real_target = abs_path($build_target) if defined($build_target);
-    if ( !defined($build_target) || !-d "$real_target" ) {    # Danglink link
-      warn qq(
- Hmm. There is a symbolic link $modules_base/$version/build
- However, I can not read it: $!
- Therefore, I am deleting $modules_base/$version/build\n
-);
-      my $num = unlink "$modules_base/$version/build";
-      if ( $num != 1 ) {
-        warn "error unlinking $modules_base/$version/build";
-      }
-      else {
-        if ( $force_build_link || -d "/usr/src/=ST-headers-$version" ) {
-          my $result = symlink( "/usr/src/=ST-headers-$version",
-            "$modules_base/$version/build" );
-          if ( !$result ) {
-            warn
-              "Could not link /usr/src/=ST-headers-$version to $modules_base/$version/build:$!";
-          }
-        } ## end if ( $force_build_link...)
-      } ## end else [ if ( $num != 1 ) ]
-    } ## end if ( !defined($build_target...))
-  } ## end if ( $relink_build_link...)
-} ## end sub fix_build_link
-
-if ( $relink_build_link || $force_build_link ) {
-  &fix_build_link();
-}
-######################################################################
-## Fix the source link
-######################################################################
-sub fix_source_link {
-  return unless -d "$modules_base/$version";
-  if ($relink_src_link) {
-    my $source_target;
-    my $real_target = '';
-
-    if ( -l "$modules_base/$version/source" ) {
-      $source_target = readlink "$modules_base/$version/source";
-    }
-    else {
-      return;
-    }
-
-    # Determine what the real file name is, and test that for existence
-    $real_target = abs_path($source_target) if defined($source_target);
-    if ( !defined($source_target) || !-d "$real_target" ) {    # Danglink link
-      warn qq(
- Hmm. The package shipped with a symbolic link $modules_base/$version/source
- However, I can not read the target: $!
- Therefore, I am deleting $modules_base/$version/source\n
-);
-      my $num = unlink "$modules_base/$version/source";
-      if ( $num != 1 ) {
-        warn "error unlinking $modules_base/$version/source";
-      }
-    } ## end if ( !defined($source_target...))
-  } ## end if ($relink_src_link)
-} ## end sub fix_source_link
-
-if ($relink_src_link) {
-  &fix_source_link();
-}
-######################################################################
-######################################################################
-######################################################################
-######################################################################
-
-# We may not have any modules installed
-if ( -d "$modules_base/$version" ) {
-  print STDERR "Running depmod.\n";
-  my $ret = system("depmod -a -F $realimageloc/System.map-$version $version");
-  my $exit_value  = $? >> 8;
-  my $signal_num  = $? & 127;
-  my $dumped_core = $? & 128;
-  if ($ret) {
-    if ( -f "$modules_base/$version/modules.dep" ) {
-      unlink "$modules_base/$version/modules.dep" unless $initrd;
-    }
-    my $seen;
-    my $answer;
-    my $question = "${package_name}/postinst/depmod-error-$version";
-    if ($initrd) {
-      $question = "${package_name}/postinst/depmod-error-initrd-$version";
-    }
-    ( $ret, $seen ) = fset( "$question", 'seen', 'false' );
-    die "Error setting debconf flags in $question: $seen" if $ret;
-
-    $ret = subst( "$question", 'modules_base', "$modules_base" );
-    die "Error setting debconf substitutions in $question: $seen" if $ret;
-
-    $ret = subst( "$question", 'SIGNAL', ", and got a signal $signal_num" );
-    die "Error setting debconf substitutions in $question: $seen" if $ret;
-
-    if ($dumped_core) {
-      $ret = subst( "$question", 'CORE', ", and dumped core" );
-      die "Error setting debconf substitutions in $question: $seen" if $ret;
-    }
-    else {
-      $ret = subst( "$question", 'CORE', " " );
-      die "Error setting debconf substitutions in $question: $seen" if $ret;
-    }
-
-    ( $ret, $seen ) = input( 'medium', "$question" );
-    if ( $ret && $ret != 30 ) {
-      die "Error setting debconf question $question: $seen";
-    }
-
-    ( $ret, $seen ) = go();
-    if ( $ret && $ret != 30 ) {
-      die "Error asking debconf question $question: $seen";
-    }
-
-    ( $ret, $answer ) = get("$question");
-    die "Error retreiving answer for $question: $answer" if $ret;
-
-    if ( !$ignore_depmod_err ) {
-      if ( $answer =~ /^(y|t)/i ) {
-        exit(1);
-      }
-      else {
-        print STDERR "Ok, continuing as directed\n";
-      }
-    } ## end if ( !$ignore_depmod_err)
-  } ## end if ($ret)
-} ## end if ( -d "$modules_base/$version")
-
-# We used to have System.* files in /
-if ( -e "/System.map" || -e "/System.old" ) {
-  my $ret;
-  my $answer;
-  my $question = "${package_name}/postinst/old-system-map-link-$version";
-
-  ( $ret, $answer ) = get("$question");
-  die "Error retreiving answer for $question: $answer" if $ret;
-
-  $answer =~ s/^\s+//;
-  $answer =~ s/\s+$//;
-  if ( $answer =~ /^(y|t)/i ) {
-    unlink '/System.map' if -e '/System.map';
-    unlink '/System.old' if -e '/System.old';
-    print STDERR "Obsolete links removed.\n";
-  }
-} ## end if ( -e "/System.map" ...)
-
-# set the env var stem
-$ENV{'STEM'} = "=ST";
-
-sub run_hook {
-  my $type   = shift;
-  my $script = shift;
-
-  print STDERR "Running $type hook script $script.\n";
-  system("$script $version $realimageloc$kimage-$version")
-    && print STDERR "User $type hook script [$script] ";
-  if ($?) {
-    if ( $? == -1 ) {
-      print STDERR "failed to execute: $!\n";
-    }
-    elsif ( $? & 127 ) {
-      printf STDERR "died with signal %d, %s coredump\n",
-        ( $? & 127 ), ( $? & 128 ) ? 'with' : 'without';
-    }
-    else {
-      printf STDERR "exited with value %d\n", $? >> 8;
-    }
-    exit $? >> 8;
-  } ## end if ($?)
-} ## end sub run_hook
-
-# Set up the env variable containing our arguments
-my $out;
-for (@ARGV) {
-  s,','\\'',g;
-  $out .= " '$_'";
-}
-$ENV{'DEB_MAINT_PARAMS'}       = "$out";
-$ENV{'KERNEL_PACKAGE_VERSION'} = "$kernel_pkg_version";
-
-if ( !$initrd ) {
-  $ENV{INITRD} = 'No';
-}
-## Run user hook script here, if any
-if ( -d "/etc/kernel/postinst.d" ) {
-  print STDERR "Examining /etc/kernel/postinst.d.\n";
-  system( "run-parts --verbose --exit-on-error --arg=$version "
-      . "--arg=$realimageloc$kimage-$version "
-      . "/etc/kernel/postinst.d" )
-    && die "Failed to process /etc/kernel/postinst.d";
-} ## end if ( -d "/etc/kernel/postinst.d")
-
-if ( -d "/etc/kernel/postinst.d/$version" ) {
-  print STDERR "Examining /etc/kernel/postinst.d/$version.\n";
-  system( "run-parts --verbose --exit-on-error --arg=$version "
-      . "--arg=$realimageloc$kimage-$version "
-      . "/etc/kernel/postinst.d/$version" )
-    && die "Failed to process /etc/kernel/postinst.d/$version";
-} ## end if ( -d "/etc/kernel/postinst.d/$version")
-
-if ($postinst_hook) {
-  &run_hook( "postinst", $postinst_hook );
-}
-
-# creating some info about kernel and initrd
-if ($DEBUG) {
-  my $ksize = sprintf( "%.0f",
-    ( stat( $realimageloc . "$kimage-$version" ) )[7] / 1024 )
-    . "kB";
-  my $initrdsize = '';
-  if ($initrd) {
-    $initrdsize = sprintf( "%.0f",
-      ( stat( $realimageloc . "initrd.img-$version" ) )[7] / 1024 )
-      . "kB";
-  }
-
-  print STDERR <<"EOMSG";
-A new kernel image has been installed at $realimageloc$kimage-$version
- (Size: $ksize)
-
-Symbolic links, unless otherwise specified, can be found in $image_dest
-
-EOMSG
-
-  if ($initrd) {
-    print STDERR <<"EOMSGA";
-
- Initial rootdisk image: ${realimageloc}initrd.img-$version (Size: $initrdsize)
-EOMSGA
-  } ## end if ($initrd)
-} ## end if ($DEBUG)
-
-exit 0;
-
-__END__
diff --git a/kernel-overlay/ruleset/arches/arm64.mk b/kernel-overlay/ruleset/arches/arm64.mk
deleted file mode 100644
index 23fc176..0000000
--- a/kernel-overlay/ruleset/arches/arm64.mk
+++ /dev/null
@@ -1,35 +0,0 @@
-######################### -*- Mode: Makefile-Gmake -*- ########################
-## arm64.mk ---
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-##
-## arch-tag:
-##
-###############################################################################
-
-### ARM (new abi)
-ifeq ($(strip $(DEB_HOST_ARCH)),arm64)
-  kimage := vmlinuz
-  target = Image
-  NEED_DIRECT_GZIP_IMAGE=NO
-  kimagesrc = arch/$(KERNEL_ARCH)/boot/Image
-  ### EDIT(aiy): Set kimagedest to destdir/Image
-  kimagedest = $(INT_IMAGE_DESTDIR)/Image
-  # kimagedest = $(INT_IMAGE_DESTDIR)/vmlinuz-$(KERNELRELEASE)
-  DEBCONFIG = $(CONFDIR)/config.arm64
-  kelfimagesrc = vmlinux
-  kelfimagedest = $(INT_IMAGE_DESTDIR)/vmlinux-$(KERNELRELEASE)
-  KERNEL_ARCH = arm64
-endif
diff --git a/kokoro/continuous.sh b/kokoro/continuous.sh
index 2000ce4..5eaa24d 100644
--- a/kokoro/continuous.sh
+++ b/kokoro/continuous.sh
@@ -18,11 +18,6 @@
 
 m prereqs
 
-# kernel-package in 14.04 is pre-arm64 . Update to the 16.04 version.
-echo "deb http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse" | sudo tee -a /etc/apt/sources.list
-sudo apt-get update
-sudo apt-get install --no-install-recommends -y kernel-package/xenial
-
 m
 m sdcard
 
diff --git a/prereqs.mk b/prereqs.mk
index 9299b20..cdbca90 100644
--- a/prereqs.mk
+++ b/prereqs.mk
@@ -13,7 +13,6 @@
 	device-tree-compiler \
 	fakeroot \
 	genext2fs \
-	kernel-package \
 	kpartx \
 	mtools \
 	parted \