clamares fails to install on a vm with gpt partition table and ext4

To reproduce run the latest lubuntu cosmic install. Then select manual partitioning and select manual partitioning. Then create a gpt partition table and select ext4 for the partition type as /. Then select install and it will continue installing until this error message.
Boost.Python error in job "packages".
<class 'subprocess.CalledProcessError'>
Command 'apt-get -q -y install linux-generic' returned non-zero exit status 100.
Traceback:
  File "/usr/lib/calamares/modules/packages/main.py", line 456, in run
    run_operations(pkgman, entry)

  File "/usr/lib/calamares/modules/packages/main.py", line 372, in run_operations
    pkgman.install(entry[key])

  File "/usr/lib/calamares/modules/packages/main.py", line 225, in install
    check_target_env_call(["apt-get", "-q", "-y", "install"] + pkgs)

  File "<string>", line 2, in <module>

Description: Ubuntu Cosmic Cuttlefish (development branch)
Release: 18.10
calamares:
  Installed: 3.1.12-1
  Candidate: 3.1.12-1
  Version table:
 *** 3.1.12-1 500
        500 http://archive.ubuntu.com/ubuntu cosmic/universe amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: calamares 3.1.12-1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.10-0ubuntu2
Architecture: amd64
CasperVersion: 1.394
CurrentDesktop: LXQt
Date: Wed May 16 18:33:27 2018
LiveMediaBuild: Lubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180513)
SourcePackage: calamares
UpgradeStatus: No upgrade log present (probably fresh install)