ubuntu desktop trusty rootfs fails to build: Cannot handle more than one kernel for generic (3.19.0-43-generic 4.2.0-23-generic)!

ubuntu trusty rootfs [1] amd64/i386 fails to build since Dec. 9th with:

Reading package lists...
Building dependency tree...
Reading state information...
Cannot handle more than one kernel for generic (3.19.0-43-generic
4.2.0-23-generic)!
Traceback (most recent call last):
  File "/usr/share/launchpad-buildd/slavebin/buildlivefs", line 164, in main
    builder.build()
  File "/usr/share/launchpad-buildd/slavebin/buildlivefs", line 125, in build
    self.run_build_command(["lb", "build"], env=base_lb_env)
  File "/usr/share/launchpad-buildd/slavebin/buildlivefs", line 74, in run_build_command
    self.chroot(["/bin/sh", "-c", command], echo=echo)
  File "/usr/share/launchpad-buildd/slavebin/buildlivefs", line 55, in chroot
    "/usr/bin/sudo", "/usr/sbin/chroot", self.chroot_path] + args)
  File "/usr/lib/python2.7/subprocess.py", line 540, in check_call
    raise CalledProcessError(retcode, cmd)
CalledProcessError: Command '['/usr/bin/sudo', '/usr/sbin/chroot', '/home/buildd/build-LIVEFSBUILD-48737/chroot-autobuild', 'linux32', '/bin/sh', '-c', 'cd /build && env PROJECT=ubuntu ARCH=i386 lb build']' returned non-zero exit status 1

[1] https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/trusty/ubuntu/