If we don't block, there is the potential for multiple shutdown,
reboot, and upgrade requests to be processed.
Signed-off-by: Andrew Rynhard <andrew@andrewrynhard.com>
This change ensures that the installer has access to the machine config
so that it can set the extra kernel arguments when installing.
Signed-off-by: Andrew Rynhard <andrew@andrewrynhard.com>