Comment 2 for bug 1094397

Exception during installation:
Dec 29 01:23:47 ubuntu plugininstall.py: Traceback (most recent call last):
Dec 29 01:23:47 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1732, in <module>
Dec 29 01:23:47 ubuntu plugininstall.py: install.run()
Dec 29 01:23:47 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 81, in wrapper
Dec 29 01:23:47 ubuntu plugininstall.py: func(self)
Dec 29 01:23:47 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 195, in run
Dec 29 01:23:47 ubuntu plugininstall.py: self.configure_python()
Dec 29 01:23:47 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 379, in configure_python
Dec 29 01:23:47 ubuntu plugininstall.py: install_misc.chroot_setup(self.target)
Dec 29 01:23:47 ubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 124, in chroot_setup
Dec 29 01:23:47 ubuntu plugininstall.py: with open(policy_rc_d, 'w') as f:
Dec 29 01:23:47 ubuntu plugininstall.py: IOError: [Errno 30] Read-only file system: '/target/usr/sbin/policy-rc.d'
Dec 29 01:23:47 ubuntu plugininstall.py: