Bootloader install fails in Ubuntu Mate Beta and Daily build

[dc]

The current beta1 and daily build Ubuntu Mate Vervet images fail to install the bootloader. The current (daily) main Ubuntu installer does not fail. This bug report contains the details for the current daily build image that resembles the main installer the most.

Platform in question is VMware Fusion, virtual hardware version 11. Disk is otherwise available, paritions were created properly.

The only extra option used during install was LVM but it also fails without selecting LVM.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubiquity 2.21.16
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
ApportVersion: 2.16.2-0ubuntu3
Architecture: amd64
CasperVersion: 1.355
Date: Sat Mar 21 10:01:04 2015
InstallCmdLine: file=/cdrom/preseed/ubuntu-mate.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu-MATE 15.04 "Vivid Vervet" - Alpha amd64 (20150320)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)