'guix system vm' questions

[myglc2 <myglc2@gmail.com>]

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I have a headless server running Guix/Debian 8.3 on which I would like
to run some guix vms. So far, I have a script (see mkvm.sh, attached)
that runs a single vm. It has some issues:

1) lsh-service hangs waiting for keystrokes on the QEMU console

2) passwords need to be set in the QEMU console

3) on the vm, 'guix package -i' throws an error, e.g.,

   (on the console)
   v1 login: u1
   password: <password>
   $ guix package -i
   accepted connection from pid 390, user u1
   guix package: error: build failed: changing ownership of '/path/store': Read-only file system

4) I can't log in to the vm like I expected, e.g. 'ssh u1@10.0.2.15'
   times out

5) I would like to have the user 'u1' share read/write access to the
   $HOME directory and be able to use $HOME/.ssh credentials

Your suggestions &/or sample configurations would be most welcome.

TIA - George

PS I am running this guix git checkout ...
   * master                                  d6e374a gnu: mafft: Update to 7.299.


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#!/bin/bash

# make and run a Guix VM

set -x
VMNUM=1
tmpdir=vm$VMNUM
rm -fr $tmpdir
mkdir $tmpdir

# vm.config
cat > "$tmpdir/vm.scm"<<EOF
(use-modules (gnu))
(use-service-modules networking ssh)
(use-package-modules admin
		     disk
		     ssh rsync wget screen
		     version-control
		     emacs
		     xorg certs
		     graphviz
		     package-management
		     )
(operating-system
  (host-name "v1")
  (timezone "America/New_York")
  (locale "en_US.utf8")
  (bootloader (grub-configuration (device "/dev/sda")))
  (file-systems (cons (file-system
			(device "g1sd")
			(title 'label)
			(mount-point "/")
			(type "ext4"))
		      %base-file-systems))
  (users (cons* (user-account
		 (name "u1")
		 (comment "u 1")
		 (group "users")
		 (supplementary-groups '("wheel"))
		 (home-directory "/home/u1"))
		%base-user-accounts))
  (packages
   (cons*
    glibc-utf8-locales
    parted
    openssh nss-certs xauth rsync wget git git-manpages
    emacs magit screen 
    graphviz
    guix
    %base-packages
    )
   )
  (services (cons* (dhcp-client-service)
		   (lsh-service #:root-login? #t)
		   %base-services)))
EOF

# show guix version
# guix system --version
(stat $HOME/.config/guix/latest | grep File:)
git -C ~/.config/guix/latest branch -av | grep '* master'
make -C $HOME/.config/guix/latest -s

# make vm & run
# Note: '-k en-us' is a hack to get Mac XQuartz keys to sort of work
$(guix system vm $tmpdir/vm.scm --expose=$HOME --share=$HOME/tmp=/exchange) -k en-us